Write the following expression without negative exponents and without parentheses. -5x^-2

Marissa earns $24 for 4 hours of babysitting chole earns $41.25 for 5 1/2 hours of babysitting who earns more per hour how much

goblinko [34]

Chloe is earning 7.50 an hour, Marissa is earning $6 an hour so the answer is Chloe is earning 50 cents more per hour.

4 0

2 years ago

Suppose you deposit $12.50 into your savings account each week for 4 weeks and then withdraw $4.80 each week for the next two we

monitta

Answer:

The total change in the amount of money in my account is $ 9.60

Step-by-step explanation:

Given:

Amount of money deposited each week, $A_{d}=\$12.50$

Amount of money withdrawn each week, $A_{w}=\$4.80$

∴ Amount of money deposited in 4 weeks, $A_{dT}=A_{d}\times 4=12.50\times 4 = \$50$

∴ Amount of money withdrawn in 2 weeks, $A_{wT}=A_{w}\times 4=4.80\times 2 = \$9.6$

Now, amount of money left in the account is the difference of the two amounts.

So, amount left = $A_{dT}-A_{wT}=50-9.6=\$40.4$

Therefore, the total change in the amount of money in my account is given as:

Total change = Initial amount after 4 weeks - Final amount in the account.

Total change = $ 50 - $40.4 = $ 9.6

7 0

3 years ago

Using a proportion, what can you infer about the number of households in her town that have more than three children?

eduard

Answer:

About 296 households have more than three children.

Step-by-step explanation:

The complete question is:

Carmen used a random number generator to simulate a survey of how many children live in the households in her town. There are 1,346 unique addresses in her town with numbers ranging from zero to five children. The results of 50 randomly generated households are shown below. Children in 50 Households Number of Children Number of Households 0 5 1 11 2 13 3 10 4 9 5 2 Using a proportion, what can you infer about the number of households in her town that have more than three children? About 242 households have more than three children. About 269 households have more than three children. About 296 households have more than three children. About 565 households have more than three children.

Solution:

The data provided for the number of children and number of households is:

Number of Children (X) Number of Households (f (X))

0 5

1 11

2 13

3 10

4 9

5 2

TOTAL 50

Compute the probability of households having more than three children as follows:

P (More than 3 children) = P (4 children) + P (5 children)

$=\frac{9}{50}+\frac{2}{50}$

$=\frac{11}{50}$

$=0.22$

Let the random variable Y be defined as the number of households having more than three children.

The probability of the random variable Y is, p = 0.22.

The entire population, i.e. total number of addresses in Carmen's town with numbers ranging from zero to five children, consists of N = 1,346 households.

Compute the expected number of households having more than three children as follows:

$E(Y) =N\times p$