Answer:
E 288
Step-by-step explanation:
just took the test
The 30-60-90 triangle's sides share a ratio of 1:√3:2 where the shortest side is the one facing opposite 30°.
This means that the longest side of aa 30-60-90 triangle is twice that of the shortest side. Now, given that the shortest side has a length of 15, then its longest side would be 2(15) = 30.
Thus, the hypotenuse is 30 units.
Z = 0.80 just to the right of z= 0. Note that the area to the right of z=0 is 0.5. The area to the right of 0.80 is smaller.
One way of answering this question is to use a calculator:
normalcdf(0.80, 1000) = 0.212 (answer)
You are told that sprinklers run for the same amount of time. lets refer to this time as T.
you are told that 4 sprinkles run one at a time for 50 minutes total. that means that T should be 50/4 = 12.5 minutes = 12 minutes and 30 seconds