39 out of 40 as a percent

Answers

Answer 1

Answer: It would be: 39/40 * 100 = 3900/40 = 97.5%

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CANT GET WRONGJason is training for a marathon bike ride. His average speed increased from 3 miles per hour to 6 miles per hour in 3 months. Find the rate of change in the miles per hour that Jason bikes. A) .5 mile per hour per month B) 1 mile per hour per month C) 2 miles per hour per month D) 3 miles per hour per month

Answers

Answer: The correct option is (B) 1 mile per hour per month.

Step-by-step explanation: Given that Jason is training for a marathon bike ride. His average speed increased from 3 miles per hour to 6 miles per hour in 3 months.

We are to find the rate of change in the miles per hour that Jason bikes.

We know that

the average rate of change between the points (a, b) and (c, d) is given by

$A_r=(d-b)/(c-a).$

Since the number of months vary from 0 to 3, and the speed increases from 3 miles per hour to 6 miles per hour,

so the two points on the co-ordinate plane with number of months plotted across X-axis and average speed plotted on Y-axis are (0, 3) and (3, 6).

Therefore, the average rate of change in the miles per hour that Jason bikes is

$A_r=(6-3)/(3-1)=(3)/(3)=1.$

Thus, the required rate of change is 1 mile per hour per month.

Option (B) is correct.

B.... 6-3=3miles in 3 months .. and that's a mile per month

a submarine at the water's surface dropped down 100 ft after thirty minutes at that depth it dove an additional 500 ft what was its depth after the second dive

Answers

600 ft I think that would be the answer

We are interested in the dimensions of a certain square. A rectangle has length twice the side of this square and width three units less than the side of this square. If the two areas are equal, what are the square's dimensions (w x h)?

Answers

We don't need the length AND width of the square. One number
will be enough for an answer, because all sides of a square have
the same length. Let's call that number ' M ' (for 'mystery number').

-- The area of the square is M² .

The question says that ...
-- The length of the rectangle is 2M .
-- The width of the rectangle is (M - 3) .

Therefore ...
-- The area of the rectangle is (2M)(M - 3) = 2M² - 6M .

The question also says that ...
-- The areas of the square and the rectangle are equal:

So 2M² - 6M = M²

Subtract M² from each side: M² - 6M = 0

Divide each side by M : M - 6 = 0

Add 6 to each side : M = 6 .

Check:

Assume ... Side of the square = 6

Then ...
Area of the square = 6² = 36 .
Length of the rectangle = (6 x 2) = 12
Width of the rectangle = (6 - 3) = 3
Area of the rectangle = (12 x 3) = 36

36 = 36 yay!

How will adding the value 75 affect the mean and median of the data set 1, 5, 7, 9 , 9, 10? A.
The mean increases and the median stays the same.

B.
The median increases less than the mean increases.

C.
The mean and the median increase by the same amount.

D.
The median increases and the mean stays the same.

Answers

B.
The median increases less than the mean increases.

Suppose customers in a hardware store are willing to buy N(p) boxes of nails at p dollars per box, as given by the following function.N(P) = 80 - 4p^2 ; 1 <= p <= 4.

Find the average rate of change in the number of boxes of nails that customers are willing to buy (demand) for a change in price from $2 to $3.

The average rate of change of demand for a change in price from $2 to $3 is ___ boxes per dollar.
(Type an integer or a decimal.)

I know the answer (-20) but I am not sure how to get it. Can you help?

Answers

Answer: -20

Step-by-step explanation:

the answer is negative twenty

. Allison drew a triangle with 2 congruent sides and 1 obtuse angle. Which terms accurately describe the triangle? Select all that apply.

Answers

Answer:

obtuse triangle

isosceles triangle

Step-by-step explanation:

A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees

Area of a triangle = 1/2 x base x height

the perimeter of a triangle = sum of the side lengths

An isosceles triangle has two opposite sides. If the two angles are equal , it means the triangle is an isosceles. Because 90 degrees is greater than 45 degrees, the two sides with the same length, would have a smaller length than the third side.

Answer:

obtuse triangle

isosceles triangle

Step-by-step explanation:

hope it helps

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