3.2 less days than 16 because each 25 is 5 than 16 divide by 5 is 3.2
The Lewis family and the Perry family each used their sprinklers last summer. The water output rate for the Lewis family's sprinkler was 15 L per hour. The water output rate for the Perry family's sprinkler was 40 L per hour. The families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 1850 L . How long was each sprinkler used
Answer:
Hours of use of sprinkler by Lewis family is 30 hours.
Hours of use of sprinkler by Perry family is 35 hours.
Step-by-step explanation:
Let W = hours of use by Lewis family
65 - W = hours of use by Perry family
Then;
15W + 40*(65 - W) = 1850
15W + 2600 - 40W = 1850
(15 - 40)W = 1850 - 2600
-25W = −750
W = 750/25 = 30
Therefore;
W = 30
65 - W = 65 - 30 = 35
Hence,
Hours of use by Lewis family is 30 hours.
Hours of use by Perry family is 35 hours.
Answer:
0.9562
Step-by-step explanation:
Binomial probability is mathematically expressed as:
Given that p=0.18, n=5 , is calculated as:
Hence, the probability of no more than 2 successes in 5 trials is 0.9562
199.
the z score for the 90th percentile is 1.28, so you can solve the equation
which gets you the 199
