Stephen researched the topic of solar-powered light for his science project. he exposed 10 new solar lights to five hours of sunlight. he recorded the number of minutes each light. continued to shine after dark in the list below.

63, 67, 73, 75, 80, 91, 63, 72, 79, 87

which of these numbers is the mean of the number of minutes in stephen's list?

a. 28

b. 63

c. 74

d. 75

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

true

step-by-step explanation:

according to the national european world center, the engineering of the ford company on elon musk's flame throwers proved the globalization of the natural wallabies and therefore, results in the growth product domestication in almonds.

answerim :

n

step-by-step explanation:

im not sure but my dad knows

explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.