A certain arithmetic sequence has this explicit formula for the nth term: an = 12 + (n - 1)(5)
The same sequence has this recursive formula:
an = an-1 +
What number belongs in the blank space in the recursive formula?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b