4 x 5 = 20
4 x 7 = 28
20 + 28 = 48
48 is your answer
Hope this helps!
Answer:
a convenience sample is always valid and reliable is true not false
Step-by-step explanation:
Using proportions, it is found that 7% of the population has blue eyes without blonde hair.
10% of the population has blue eyes. These 10% are composed by:
- 75% of 4%(have blonde hair).
- x% of 96%(do not have blonde hair)
Hence, the relation according to the proportion of 10% is:



Out of the entire population:
0.0729(0.96) = 0.07
7% of the population has blue eyes without blonde hair.
You can learn more about proportions at brainly.com/question/24372153
Answer: B. 15.7 inches
Step-by-step explanation:
The ramp forms a right angle triangle. The height of the ramp above the ground represents the opposite side of the triangle. The length of the ramp represents the hypotenuse of the right angle triangle. The base of the ramp represents the the adjacent side of the right angle triangle. Therefore, to find r, we would apply Pythagoras theorem which is expressed as
Hypotenuse² = opposite side² + adjacent side²
r² = 7² + 14² = 49 + 196
r² = 245
r = √245
r = 15.7 inches to the nearest tenth