The SPEED of an object falling from rest in a vacuum varies DIRECTLY to the TIME it has fallen. After an object has fallen 13 seconds its speed is 52 m/sec. What is the speed after it has fallen 18
seconds?

72 m/s

Step-by-step explanation:

equation used is

52/13 = 4/1 = x / 18

where x is speed we have to find

x> 6

step-by-step explanation:

8x+8> 7x+14

8x-7x> 14-8

x> 6

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;