Aforest consists of two types of trees: those that are 0–5 ft and those that are taller than 5 ft. each year, 40% of all 0–5ft tall trees die, 10% are sold for $20 each, 30% stay between 0 and 5 ft, and 20% grow to be more than 5 ft. each year, 50% of all trees taller than 5 ft are sold for $50, 20% are sold for $30, and 30% remain in the forest. a what is the probability that a 0–5-ft tall tree will die before being sold? b if a tree (less than 5 ft) is planted, what is the expected revenue earned from that tree?

a. 40%

b. $3.2

Step-by-step explanation:

a. As each year 40% of all 0-5ft trees die and other 10% are sold. That means the probability of a 0-5ft tall tree will die before being sold is 40%.

b. The probability of a tree that grows from 0-5ft to more than 5 ft AND get sold is

20% * 20% = 0.2 * 0.2 = 0.04

The probability that a tree stays the same and gets sold in the following year is small and can be neglected.

The expected value to earn from a planted tree is the combination of the expected value of its being sold at between 0-5ft and when it's more than 5 ft

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.

10

step-by-step explanation: