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VMariaS [17]
4 years ago
13

This year, Carmen watched 70 movies. She thought that 21 of them were very good. Of the movies she watched, what percentage did

she think were very good?
Mathematics
1 answer:
spin [16.1K]4 years ago
8 0

Carmen thought 30% of the movies were good.

I found the percent by dividing 21 by 70

21/70= .3

.3= 30%

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Katie blows up a balloon and ties it so there is a fixed amount of air in the balloon.
kifflom [539]

Answer:

According to Charles' Law the order of arrangement of the location where the balloon has the smallest size to the location where the balloon has the largest size is given as follows;

A freezer < A cold refrigerator < A normal room temperature classroom < A warm cupboard

Step-by-step explanation:

The parameter of the balloon Katie blows are;

The amount of air in the balloon = Fixed (constant)

The initial size of the balloon = The length of the measured string

The locations in which the balloon can be placed = A freezer, a warm cupboard, a cold refrigerator, a normal temperature classroom

The size of the balloon is given by the volume of the balloon

according to Charles' Law, the volume of a given mass of gas is directly proportional to its temperature

Mathematically, Charles law can be expressed as follows;

V ∝ T

Therefore, as the temperature to which the balloon is subjected decreases, the volume decreases

The locations arranged in order of increasing temperature is given as follows;

Freezer < Cold refrigerator < Normal temperature classroom < Warm cupboard

Given that Katie blow's the balloon in a normal temperature classroom, according to Charles Law, we have;

The temperature of the air in the balloon decreases largely in a freezer, therefore, the size of the balloon largely decreases

The temperature of the air in the balloon increases in a warm cupboard, therefore, the size of the balloon increases

The temperature of the air in the balloon decreases slightly in a cold refrigerator, therefore, the size of the balloon decreases

The temperature of the air in the balloon remains the in a normal temperature classroom, therefore, the size of the balloon remains the same

The size of the balloon reduces the most in a freezer

The size of the balloon increases in a warm cupboard

The size of the balloon decreases slightly in a cold refrigerator

The size of the balloon remains the same in a normal temperature classroom.

8 0
3 years ago
Look at the two inequalities. Select all the values from the set (4 ½, 7, 10, 15.5, 20) that make both inequalities true.
dem82 [27]

Answer:15

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The formula for the area of a trapezoid is A = h(b1 + b2), where A = area, h = height, b1 = base 1, and b2 = base 2.
stepladder [879]

Answer:

4

Step-by-step explanation:

A=h(sum of base)

60=h(15)

60/15=h

h=4

6 0
3 years ago
In a certain class, 18/25 of the students got problem 10 wrong on Friday's math test.
tester [92]

Answer:

72% i think but I may be wrong

3 0
3 years ago
Does anybody know this?
Inessa05 [86]

Answer:

1/3

Step-by-step explanation:

The two points are (2, -1) and (-1, -2).

Slope is y change over x change.

So... -2-(-1) over -1-2 which is -2+1 over -3

Slope is -1/-3

The answer is 1/3.

Hope this helps :D

5 0
3 years ago
Read 2 more answers
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