Answer: 32.54
Step-by-step explanation:
Change 5% into a decimal --> .05 then
multiply by the price 30.99 times .05 is 1.5495 then
take 1.5495 and add 30.99 = 32.5395
Round decimal total --> 32.54
Answer:
a. The proportion of vehicle speeds were between 25 and 57 mph is 68.26%
b.The proportion of vehicle speeds exceeded 57 mph is 15.87%.
Step-by-step explanation:
a. To calculate what proportion of vehicle speeds were between 25 and 57 mph we would have to make the following calculations:
Probability that the vehicle speeds were between 25 and 57 mph is given by:
P(25≤x≤57)
=P(<u>25-41 </u>≤ <u>x-μ </u> ≤ <u>57-41)</u>
16 σ 16
=P(-1≤z≤1)
=P(z≤1)-P(z≤1)
=0.8413-0.1587
=0.6826
The proportion of vehicle speeds were between 25 and 57 mph is 68.26%
b. To calcuate what proportion of vehicle speeds exceeded 57 mph, we would have to make the following calculation:
Probability that vehicle speeds exceeded 57 mph is given by
P(x>57)
=P(<u>x-μ </u> > <u>57-41)</u>
σ 16
=P(z>1)
=1-P(z≤1)
=1-0.8413
=0.1587
The proportion of vehicle speeds exceeded 57 mph is 15.87%.
Answer:
Step-by-step explanation:
Add 9x to both sides:
Simplify:
Solve with the quadratic formula:
For a quadratic equation of the form the solutions are:
For
The solution to the quadratic equation are:
Hope I helped. If so, may I get brainliest and a thanks?
Thank you, have a good day!
X= 270
simplify the equation using cross multiplication