Marianna wants to buy a new tennis racket that costs $57.50.
she has $8 and plans to save $4.50 each week. how many weeks
will it take her to save the money?

11 weeks

Step-by-step explanation:

4.50×11=49.5

49.5+8=57.50

It will take Marianna 11 weeks to save up the money for a new tennis racket.

Step-by-step explanation:

Step 1: Take 57.50 and subtract 8 from it, which gives you 49.50.

Step 2: You can take 4.50 and start multiplying it by any number to find the answer.

Step 3: Ultimately, you can multiply 4.50 by 11 and get exactly 49.50. Which then making 11, your answer.

the answer is c)8

step-by-step explanaction:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;