A school cafeteria has a juice dispencer that holds 640 ounces of juice when completely filled. Juice is offered in 2 sizes: 4 ounces or 8 ounces. Each day, approximately 7 out of 10 students choose the 4-ounce serving size and the other student choose the 8-ounce serving size.

The estimate is 13 servings

Step-by-step explanation:

7 out of 10 students choose the 4-ounce serving size. The other students choose 8-ounce serving size.

7x4=28

3x8=24

28+24=52

640 divided by 52 is equal to 12.3076923077

Estimate that number and you will get 13.

The answer is 13 servings

the answer is b i just did that

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.