Testing: H0:μ≤4.6
H1:μ>4.6
Your sample consists of 30 values, with a sample mean of 6.4. Suppose the population standard deviation is known to be 3.91.
Calculate the value of the test statistic, rounded to 2 decimal places.
z=?

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

vbbv

step-by-step explanation:

it should be a and d. lmk if i'm wrong xd