Hello!
We have to find how fast the car goes a minute
To find this we can do 57/60 since the car goes 57 miles an hour and there are 60 minutes in an hour
This gives us 0.95 miles a minutes
Then we do how fast the car goes a minute by the amount of minutes
So 0.95 * 15 = 14.25
The car goes 14.25 miles in 15 minutes
Hope this helps!
Answer:
y=8.94
Step-by-step explanation:
use the formula: a^2+b^2=c^2
64+y^2=144
y=
or y=8.94
Answer:
The answer is C.
Step-by-step explanation:
Answer:
Step-by-step explanation:
H0 : μ = 46300
H1 : μ > 46300
α = 0.05
df = n - 1 = 45 - 1 = 44
Critical value for a one tailed t-test(since population standard deviation is not given).
Tcritical = 1.30
The test statistic :(xbar - μ) ÷ (s/sqrt(n))
The test statistic, t= (47800-46300) ÷ (5600√45)
t = 1500
t = 1500 / 834.79871
t = 1.797
The decision region :
Reject H0: if t value > critical value
1. 797 > 1.30
Tvalue > critical value ; We reject H0
Hence, there is sufficient evidence to conclude that cost has increased.
