Answer:
C
Step-by-step explanation:
Given
3
= 24 ( divide both sides by 3 )
= 8
Raise both sides to the power of 
x + 9 = 
= ![(\sqrt[3]{8}) ^{4}](https://tex.z-dn.net/?f=%28%5Csqrt%5B3%5D%7B8%7D%29%20%5E%7B4%7D)
= 
= 16 ( subtract 9 from both sides )
x = 7 → C
Answer:
36 runners finished the race.
Step-by-step explanation:
In the first half of the race, 1/4 of them dropped, so we need to calculate 1/4 of 80:
(1/4) * 80 = 80/4 = 20
If 20 runners dropped out, now we have 80 - 20 = 60 runners.
Then, in the second half, 2/5 of the remaining runners dropped out, so:
(2/5) * 60 = 2*60/5 = 120/5 = 24
If 24 runners dropped out, now we have 60 - 24 = 36 runners.
So, 36 runners finished the race.
Answer:
Step-by-step explanation:
Answer:
Perimeter = 42 units Area = 57.73 square units
Step-by-step explanation:
Perimeter of an Astroid = 6l ---> 6 x 7 = 42 units
Area of an Astroid = (3 x pi x a^2)/8 = 57.73 square units
