3 years ago

Divide 71/9 2/34 A. 21/4 B. 23/4C. 41/4D. 413/16HELLPPPPPP

Mathematics

1 answer:

ozzi3 years ago

8 0

Answer:

A 5.25, B 5.75, C 10.25, D 25.8125

Step-by-step explanation:

You might be interested in

The librarian at the local elementary school claims that, on average, the books in the library are more than 20 years old. To te

Cerrena [4.2K]

Answer:

The observed t (2.533) is in the tail cut off by the critical t (2.462), therefore we reject H0. It is likely that the books are older than 20 years of age on average.

Step-by-step explanation:

Step 1: Hypotheses and α level 

H0: μ ≤ 20

H1: μ > 20

α = 0.01

Step 2: Critical region

α = .01

One-tailed

df = n – 1 = 30 – 1 = 29

t - critical = 2.462 

Step 3: Calculate t which is observed 

sM = √(s2 / n) = √(67.5 / 30) = 1.5

t = (M – μ) / sM

t = (23.8 – 20) / 1.5

t = 2.533 

3 0

3 years ago

According to a certain country's department of education, 43.7% of 3-year-olds are enrolled in day care. What is the probabi

inn [45]

The probability is 43.7/100

6 0

2 years ago

The gas tank is 20% full. At $3.00 per gallon of gas, find the cost to fill the tank. (1 gal = 231 in.3)

rewona [7]

The correct question in the attached figure

we know that

to fill the tank is required--------> 100%-20%--------> 80%
if 20% of the gas tank is-----------------> 288.75 gal
80% --------------------------------------> X gal
X=80*288.75/20--------> X=1155 gal

if 1 gal----------------> cost $3
1155 gal----------> $X
X=1155*3--------> X=$3465

the answer is
the cost to fill the tank is $3465