Me fast !

a bag contains 28 blue marbles and 12 red marbles. if milton removes two marbles without replacing them, what is the probability that the first marble will be blue and the second one will be red?

a) 21/100

b) 77/390

c) 14/65

d) 1/4

2) an airplane climbs at a slope of 2525 at takeoff. at point a, the plane is 200 feet above the ground. the plane traveled 1,000 feet horizontally, as shown in the diagram below.

what is the altitude of the plane (b) at point b?

a) 600 ft.

b) 2,500 ft.

c) 200 ft.

d) 400 ft.

you : )

question

what is the value of the third quartile of the data set represented by this box plot? a. 19 b. 21 c. 26 d. 29

answer

c

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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