Mohammed, Karan, and Larry order a bunch of food on DoorDash and their total food and delivery bill is $86. If they want to leave the DoorDash driver an additional 25% tip on top of the food and delivery bill, what will their total cost be for the entire meal?

$2.15

$107.50

$88.50

$21.50

107.50

Step-by-step explanation:

$86 x 25% = 21.5

86 + 21.5 = 107.50

$107.50

Step-by-step explanation:

Take that 25% and move the decimal point two spaces to the left. This will turn that 25% into .25

Now multiple that .25 times the $86 dollars.

That will give you the decimal 21.5,  but since this is money, you would add a zero at the end to say that its fifty cents, giving you $21.50

You add that $21.50 to the $86 dollars you originally had which will give you the final answer of $107.50

Hope this helps

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;