Answer:
The test statistic is -1.00
Step-by-step explanation:
Test statistic (Z) = (sample mean - population mean) ÷ sd/√n
sample mean = 38.8miles/gallon, population mean = 39miles/gallon, sd = 2.2miles/gallon, n = 120vans
Z = (38.8 - 39) ÷ 2.2/√120 = -0.2 ÷ 2.2/10.95 = -0.2 ÷ 0.20 = -1.00 (to 2 decimal places)
Answer:
It is f(x) = -x^2 + 2x + 4.
Step-by-step explanation:
As it has a maximum the coefficents of x^2 will be negative.
f(x) = -x^2 + 2x + 4
The y-intercept occurs when x = 0 so
y-intercept = 0 + 0 + 4 = 4.
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Answer:
240 min or 4 hours
Steps:
1- 200 pages/ 25 pages > 8
2- 8 x 30 minutes > 240 minutes
3- Optional- To convert to hours- 240 minutes/ 60 minutes > 4 hours
Hope this helps! If it does would u consider a brainliest.
Answer:
-6
Step-by-step explanation:
if you use y = mx + b, b is the y-intercept
