We know that he weeds gardens for 15 hours, and mows lawns for x hours.
If he wants to earn $252 per month, we can express the following
Now, we solve for x
<h2>Hence, he has to mow lawns for 13 hours to earn at least $252.</h2>
The answer is b because it is b
The probability of obtaining a head or tail in tossing a coin is modeled by the binomial distribution.
The probability of obtaining heads (success) is p = 1/2.
In n tosses, the expected statistical parameters are
m = np, the mean
σ = √[np(1-p)]
In 72 tosses of the coin, the standard deviation for the number of heads obtained is
σ = √[72*(0.5)*(0.5)]
= 4.243
Answer: 4.243
it is infintely many i think so