Will works 7 hours a day, 6 days a week. he is paid 9.20 an hour. he shares is wages with his mum in the ratio will: mum 5: 2

7 weeks.

Step-by-step explanation:

Will works 7 hours a day, 6 days a week. So total number of hours worked by Will is,

hours

He earns £9.20 an hour, so total money earned in a week by Will will be,

As he shares with his mother in a ration of 5:2, so he gets 2 parts out of 7 parts. (as 5+2=7)

So the actual amount saved by Will is,

The price of the car is £1932, so the number of week that Will will take is,

were is the equation

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;