The altitude of a (in feet) of a plane t minutes after liftoff is given by a=3400t + 600. how many minutes after liftoff is the plane at an altitude of 21,000 feet?

If our equation is , and we have a target altitude of , we just need to plug that in for .

. Now subtract from both sides.

. now divide both sides by .

.

We get that our answer is at 6 minutes we get an altitude of 21,000 feet!

the probability that a bird is green (.30) is true

step-by-step explanation:

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;