Kaitlyn missed 15% of the 20 questions on her science lab.How many questions did Kaitlyn answer correctly?

20* .15=3
she missed 3 questions.
20-3=17

Related Questions

In a school election, 3/4 of the students vote. There are 1464 ballots. Write an equation using s as the variable to represent the total number of students.

it would be 75% of the students so divide

The equation is (3/4)*s = 1464. By solving for 's', we find that there are 1952 students in total at the school.

Explanation:

In the problem, it's given that 3/4 (or 75%) of the total number of students in the school voted in an election, and that number amounts to 1464 voted ballots. We can write this as a proportion of fractions to determine the total number of students (s). The equation is (3/4)*s = 1464.

To solve for the total number of students in the school, or s, you would divide 1464 by (3/4). This results in s being equal to 1952 students. This means that there are 1952 students in total at the school.

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Suppose that on a coordinate plane a hexagon is reflected across the x-axis. Compare the area of the original hexagon to the area of the transformed figure. Justify your answer. A) The areas may or may not be the same because the scale is not given. B) The areas are equal. A reflection is a rigid transformation, which does not change the size of the original hexagon. Therefore, the area is preserved. C) The area of the original hexagon is greater than the transformed figure. A reflection decreases the size of the original polygon. Therefore, the area is not preserved. D) The area of the transformed hexagon is greater than the original figure. A reflection increases the size of the original polygon. Therefore, the area is not preserved.

Reflection along x-axis is just a swapping of left and right sides. It does not change the size or area of the hexagon.

Hence, the correct option is B.

Find f

thanks for helping

It should be F=(C * 9/5) +32 I believe

15.5% of what number is 108.5?

700

Step-by-step explanation:

Let the number is x

15.5% of x is 108.5

0.155x = 108.5

x = 108.5/0.155

x = 700

16.74

Step-by-step explanation:

Donna charges \$25.75 for a haircut and \$40.50 for a color treatment. Donna did 5 haircuts and 3 color treatment each day for 6 days. How much money did Donna earn altogether?

First, do 25.75 and multiply it times 5.
Second, do 40.50 and multiply it by 3.

The air in a tire pump has a volume of 1.50 L at a temperature of 5.00ºC. If the temperature is increased to 30.0 ºC and the pressure remains constant, what is the new volume? Do not forget to convert ºC to K.

The new volume is 1.63 L

Step-by-step explanation:

A tire pump has a volume of 1.5 L, while the temperature is 5 °C When the temperature changes to 30 °C, the volume will change as well.

The pressure remains constant.

Since the pressure is constant we can use the following formula:

V1/T1  = V2/T2

V1 = the initial volume = 1.5L

T1 = the initial temperature = 5 °C = 273.15 + 5 = 278.15 K

V2 = the final volume = TO BE DETERMINED

T2 = the final temperature = 30 °C = 273.15 + 30 = 303.15 K

1.5L/ 278.15 Kelvin = V2/303.15 K

V2 = (1.50L * 303.15 Kelvin) / 278.15 Kelvin = 1.63 L

When the temperature increased from 5°C to 30°C, the volume will change to 1.63 L