Answer: 53.659 seconds
Step-by-step explanation:
Given: Vega swam her leg of the race in 27.98 seconds.
Janice swam her leg of the relay race in 25.679 seconds.
Then , their combined time for their part of the relay = (Time taken by Vega) + (Time taken by Janice)
= 27.98 seconds +25.679 seconds
= (27.98+25.679) seconds
= 53.659 seconds
Hence, their combined time for their part of the relay = 53.659 seconds
Answer:
$8 16 24 32 40 48 56 64 72 80
---------------------------------------------------------------------------
4 8 12 16 20 24 28 32 36 40
Step-by-step explanation:
Answer: unbiased; simple random sampling
Step-by-step explanation:
From the question, we are informed that John wanted to know about the popularity of a particular movie and that he surveyed 20% of the people in 5 different theaters.
This is an unbiased sample. This is because everybody at the theaters have an equal chance of being chosen by John.
Also, it's a simple random sampling. This is because a subset of the entire population is randomly selected.
Draw a triangle with shortest side on the ground (horiz.). The length of this side is 80 feet. Two angles touch the ground: a right angle, and the 70 degree angle.
Then the height of the building is the 2nd shortest side.
The tangent function is the appropriate one to use here:
opp h
tan 70 deg = -------- = ----------
adj 80 ft
h
Since tan 70 deg = 2.75, 2.75 = -------
80 ft
so h = building height = (80 ft)(2.75) = 219.8 ft
