Another submarine's descent can be represented as y=-240x, where y is the elevation and x is the time in hours. How long did it take the submarine to descend to the seafloor 2,100 feet below the surface?

Answer:

8 hours and 45 minutes

Step-by-step explanation:

-2100 divided by -240 = 8.75 or 8 hours and 45 minutes

A jar contains 8 red marbles, 10 blue marbles, and 2 yellow marbles. One marble is chosen at random. The color is recorded in the table and then it is returned to the jar. This is repeated 40 times. What is the experimental probability of choosing a yellow marble? Express your answer as a percent to the nearest whole number.

RED/14 BLUE/16 YELLOW/10

The ratio of tables to chairs at the furniture store is 1:6. There are 30 chairs. How many tables are there?

A company introduced a much smaller variant of its tablet, known as the tablet junior. Weighing less than 11 ounces, it was about 50% lighter than the standard tablet. Battery tests for the tablet junior showed a mean life of 10.25 hours. Assume that battery life of the tablet junior is uniformly distributed between 7.5 and 13 hours.
(a)
Give a mathematical expression for the probability density function of battery life.
f(y) =

(b)
What is the probability that the battery life for a tablet junior will be 10.5 hours or less? (Round your answer to four decimal places.)
(c)
What is the probability that the battery life for a tablet junior will be at least 11.5 hours? (Round your answer to four decimal places.)
(d)
What is the probability that the battery life for a tablet junior will be between 8.5 and 10.5 hours? (Round your answer to four decimal places.)
(e)
In a shipment of 100 tablet juniors, how many should have a battery life of at least 12 hours? (Round your answer to two decimal places.)
tablet juniors

HELP MY FRIENDS PLEASE I BEG OF THEE​

How many millimeters equal 5 liters?

A family is booking a trip to Florida and the travel agent knows that for families with children of similar ages the probability of visiting Busch Gardens is 40% and the probability of visiting Sea World given that they visited Busch Gardens is 60%; also the agent knows the probability of this type of family visiting either Busch Gardens or Sea World is 70%. To determine the best package for this family, the agent wants to determine the probability that this family will visit Sea World without consideration to the fact that they visited Busch Gardens.

Does Allena uses 1/2 gallon or less than 1/2 of water

can 8 go into 3? plz answer

This is Adeles solution for the equation x^2+8x- 9 = 0 Step 1 x^2 +8x = 9 Step 2 x^2 +8x + 16 = 9 + 16 Step 3 ( x + 4 ) ^2 = 25 Step 4 x + 4 = 25 or x + 4 = - 25 Step 5 x = 21 or x = - 29. Where did Adele make her mistake? What are the solutions to this equation? Show all of your work. 2. Which would be the best method to use to solve the following equation. Explain your reasoning. A x^2 - 49 = 0 B. x^2 - 3x - 4 = 0 C. x^2 - 2x - 6 = 0 ​

Consider the diagram. What is the value of x

(Middle schoolers!)
If you need help with Draw Inferences from Data I have everything you need!
Just ask the question then come to me and I can answer it for you!
This is for do you know/how do you understand!

Write the equation of a line in point-slope form whose slope is 7 and passes through the point (7, -2).

What is the definition of an irrational number?

A.
a negative number

B.
a number that can be expressed as a fraction, , where p and q are integers and q is not equal to zero

C.
a number that cannot be expressed as a fraction, , where p and q are integers and q is not equal to zero

D.
a number that can be written as a fraction but not as a decimal

I'm in a test please help

Select ALL the correct answers. A bicycle manufacturer uses the given expression to model the monthly profit from sales of a new model of bicycle, where x is the selling price of one bicycle, in dollars. -12 + 3001 20,000 At what selling prices for the bicycle will the manufacturer make neither a profit nor a loss? $50
$250
$200
$100
$150
$300​

There were approximately 3.3 x 108 people in the United States of America in 2018. The average person consumed about 3.4 x 10 milligrams of sodium cach day. Approximately
how much sodium was consumed in the USA in one day in 2018? Write answer in scientific notation.

Which statement about the area of a right triangle is true?
F :The area formula for a right triangle is the base times the height because a rectangle can be
divided into two right triangles.
G: The area formula for a right triangle is the base times the height because a right triangle
can be divided into two rectangles.
H: The area formula for a right triangle is one-half of the base times the height because a
rectangle can be divided into two right triangles.
J: The area formula for a right triangle is one-half of the base times the height because a right
triangle can be divided into two rectangles.

The question about btw if answer correctly I’ll give brainalist + 10 points this is half my grade so please be truthful in your work

what is 3p-5= -44
can anyone answer this
​

Select the correct answer. What is the fractional form of 0.02 ? A. 2/99 B. 1/11 C. 2/100 D. 1/12

Select the statement that describes this expression: (3,647 + 123) + 72. (2 points)

Group of answer choices

72 more than the sum of 3,647 and 123

72 times the sum of 3,647 and 123

72 more than the difference between 3,647 and 123

72 more than the product of 3,647 and 123

Eight more than the product of a number and 4 is equal to 9

Two functions are shown below.
f(x) = 2x
g(x) = x2 + 3x - 3
For what values of x is f(x) > g(x)?

PLEASE HELP!!!!
The composite figure shown is made of a trapezoid and a
square. What is the area of the figure

Please help 20 points
Consider the net of a square box where each unit on the coordinate plane represents five feet. If a can or spray paint covers 30 square feet, how many cans of spray paint are needed to paint the outside of the box blue?

3
4
5
6​

if 4=p (p+5)=21 find p​

the two the numbers -2.6 and -2.1 are shown on the number line what is the distance between the two points​

Match each fraction on the left with the corresponding percent on the right. Some options on the right will be used more than
once.

What is the approximate area of the shaded region in the given square containing 2 semicircles? (Use * 3.14.) 10 cm 0 21.5 square centimeters O 50 square centimeters O 78.5 square centimeters O 100 square centimeters

Helppppppppppp meeeeeeeeee

Greatest common factor of 2x^3 and 5x