4g/cm^3
D = M/V
100g/25cm^3 = 4g/cm^3
3
8(3)(1/2)=12
2(1/2)(4)=4
12/4=3
Answer:
1.5
Step-by-step explanation:
of the similar shapes you are only given the lengths of two corresponding sides, 22mm and 33mm
if you do 33/22 you get 1.5 so your scale factor is 1.5
(in order to go from the original shape to the copy times by 1.5, and divide if you know the length of the copy and want to work out the original)
Answer:
a)1 cup of flour
b)67.5 minutes
Step-by-step explanation:
a) A recipe requires 3 cups of flour to make 27 dinner rolls. How much flour is needed to make 9 rolls?
From the above question, we know that:
27 dinner rolls = 3 cups of flour
9 dinner rolls = x
Cross Multiply
27 rolls × x = 9 rolls × 3 cups
x = 9 rolls × 3 cups/27 rolls
x = 1 cup of flour
Hence, 1 cup of flour is needed to make 9 dinner rolls
b) Mandy runs 4 km in 18 min. She plans to run in a 15 km race. How long will it take her to complete the race?
From the above question:
4 km = 18 minutes
15km = x
Cross Multiply
4km × x = 15km × 18 minutes
x = 15km × 18minutes/4km
x = 67.5 minutes
Hence, in a 15km race , it would take her 67.5 minutes to complete her race.
