Mara spent 1 1/2 on science homework. this is 2/3 of the time she had spent on her homework. how much time did she spend on her homework?

5/6 hours

2 1/6 hours

2 1/4 hours

4/9 hours

Good evening ,

Step-by-step explanation:

1 1/2 = 2/2 + 1/2 = 3/2

let t represent the time she spent On her homework

3/2 = 2/3(t) then t= 3/2×3/2 = 9/4 = 2 1/4.

:)

The correct answer is C. 2 1/4 hours.

Step-by-step explanation:

1. Let's review all the information provided for answering the question properly:

Time Mara spent on her science homework = 1 1/2 hours

Science homework = 2/3 of the total time on her homework

Time Mara spent on her homework = x

2. For calculating the total time Mara spent on her homework, we make this calculation using the Rule of Three Simple:

x = (1 1/2)/2/3

x = 3/2 / 2/3 (1 1/2 = 3/2)

x = 3/2 / 2/3

x = 3/2 * 3/2 = 9/4

x = 9/4 = 2 1/4

x = 2 1/4 hours

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63