To prepare for a bake-off, Sarah used 0.68 kilogram of flour each day for 2 weeks. How many grams did Sarah use in those 2 weeks? 1 kg = 1,000 g

Sarah used 9520 grams of flour in 2 weeks

Step-by-step explanation:

1. Sarah used 0.68 kilograms daily for two weeks. Two weeks is 14 days. multiply 0.68 kilograms by the amount of days (14) = 9.52 kilograms

2. convert kilograms into grams by multiplying by 1000

9.52kg×1000=9520g

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240