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prohojiy [21]
3 years ago
12

A local gymnasium is trying to find out what additional classes they should offer. They send out 50 surveys to a random selectio

n from all of their customers and follow up with phone calls to those that they don't get a response from. Is this a good way for the gym to collect data? A) No, they should send out surveys to all of their customers.
B) Yes, by randomly selecting them they will get a representative sample.
C) No, they should just survey the next 50 customers that come to the gym.
D) Yes, but they shouldn't follow up with phone calls. Just look at the ones
Mathematics
1 answer:
Alona [7]3 years ago
6 0

Answer:

I'm pretty sure the answer is B I hope it's right

Step-by-step explanation:

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Answer:

V = 34,13*π   cubic units

Step-by-step explanation: See Annex

We find the common points of the two curves, solving the system of equations:

y²  = 2*x                           x = 2*y  ⇒  y = x/2

(x/2)² = 2*x

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From these  two points, we get the integration limits for dy ( 0 , 4 )are the integration limits.

Now with the help of geogebra we have: In the annex segment ABCD is dy then

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V = π * [(4/3)y³ - (1/20)y⁵] |₀⁴

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