Suppose the diameter at breat height (in.) of tress of a certain tpye is normally distributed with μ = 8.8 and σ = 2.8, as suggested in the article "Simulating a Harvester-forwarder Softwood THinning" (Forest Products J., May 1007: 36-41). a. What is the probability that the diameter of a randomly selected tree will be at least 10in.? Will exceed 10in.? b. What is the probability that the diameter of a randomly selected tree will exceed 20in? c. What is the probability that the diameter of a randomly selected tree will be between 5 and 10in.? d. What value c is such that the interval (8.8 − c, 8.8 + c) includes 98% of all diameter values? 3 e. If four trees are independently selected, what is the probability that at least one has a diameter that exceeds 10in.?

  about 5.6 days

step-by-step explanation:

we can fill the given information into the decay equation and solve for the value of t at which half the sample remains.

the half-life is about 5.6 days.

i can't read the graph

step-by-step explanation:

idk man good luck man

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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