Answer:
Yes, the mean number is more than 40
Step-by-step explanation:
The null hypothesis
H0 = mean is 40
Let´s make the t test
t = (x – mean) / standard deviation / √sample size
t = (42 – 40) / 2.1 / √28
t = 5.039
now we find t value for one tail, using a T-distribution table
df = n – 1 = 27
α = 0.05
so, t = 1.703
since our calculated t value is greater than the t for the table, the null hypothesis can be rejected. So the mean number of calls per salesperson per week is more than 40.
Ok the ladder and the ground will make a right triangle/right angle. This is because the ground is flat, the wall is straight and only the ladder is leaning/slanted. I hope this helps.
a. 9 ones, 36 hundredths = 3 ones, 12 hundredths = 3.12
b. 36 ones, 012 thousandths = 12 ones, 004 thousandths = 12.004
c. 35 tenths, 5 hundredths = 71 hundredths = 0.71
d. 3 ones divided by 5 + 545 thousandths divided by 5 = 709 thousandths = 0.709
Answer:
The side length is irrational
Step-by-step explanation:
Because the square root of 23 or 20+3 is a non-perfect square root and it's a never ending decimal.