144pi
becous the radius is 24pi/(pi*2) and thet is 12
now 12²*pi is 144pi
<h3>
Answer: 248 miles</h3>
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Work Shown:
1 hr, 30 min = 1 hr + 30/60 hr
1 hr, 30 min = 1 hr + 0.5 hr
1 hr, 30 min = 1.5 hr
The driver travels 93 miles in 1.5 hours, so his speed is
rate = distance/time
r = d/t
r = 93/1.5
r = 62 mph
In four hours, he travels
d = r*t
d = 62*4
d = 248 miles
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An alternative method is shown below
(93 miles)/(1.5 hrs) = (x miles)/(4 hours)
93/1.5 = x/4
93*4 = 1.5*x ..... cross multiply
372 = 1.5x
1.5x = 372
x = 372/1.5
x = 248
Answer:
Step-by-step explanation:
Since the noise level of a lawn tractor is approximately
normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - u)/s
Where
x = the noise level
u = mean noise level
s = standard deviation
From the information given,
u = 100 decibels
s = 3 decibels.
We want to find the probability that a randomly selected lawn tractor will generate a noise level of
more than 105 decibels. It is expressed as
P(x > 105) = 1 - P(x ≤ 105)
For x = 105,
z = (105 - 100)/3 = 1.67
Looking at the normal distribution table, the probability corresponding to the z score is 0.9525
P(x > 105) = 1 - 0.9525 = 0.0475
Answer:
40 + ( -63) is less
Step-by-step explanation:
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