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KiRa [710]
3 years ago
5

The letters from the word "alert" are used to form a password into a school computer system. How many 5-letter passowrds can be

formed if the letters can be used more than once?
a. 3125
b. 50
c. 120
d. 625
Mathematics
1 answer:
Sliva [168]3 years ago
6 0
The correct answer is a. 3125

That's because the letter can be used more than once, so if you start and try everything from aaaaa, to ttttt, the possibilities are huge and much larger than any of the lower numbers.
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A basket contains apples and oranges. some are ripe and some are not. 30% of the fruits are apples and 50% of the fruits are rip
Lynna [10]
Since 50% are ripe, and you know that 25% are ripe apples, you also can assume 5% of apples aren’t ripe. From that you know that 50% + 5% is ripe oranges, and apples. So 45% are not ripe oranges
8 0
2 years ago
A model for the density δ of the earth’s atmosphere near its surface isδ=619.09−0.000097pwhere p (the distance from the center o
natta225 [31]

Answer: 3.751*10^18kg

Step-by-step explanation:

δ =619.09−0.000097p....equa1 where p (the distance from the center of the earth) is measured in meters and δ is measured in kilograms per cubic meter.

Calculating the density of air at 5km above earth surface

P = 5000m + 6370000m = 6.375*10^6m

δ = 619.09 -(.000097* 6.375*10^6)

δ = 0.715kg/m^3 = density

Since Mass = density*volume...equ2

To calculate volume of air around the spherical earth at height 5km

V = (4/3 pai R^3) - (4/3pai r^3) ...equation 3 where R =6.375*10^6m, r = 6.37*10^6

Substituting R and r in equation 2 to solve for volume of air

V = 1.085*10^21 - 1.08*10^21

V = 5.25*10^18m^3

Substituting δ and V into equation 2 to solve for mass of air

M = 0.715 * (5.25*10^18)

M = 3.751*10^18kg

8 0
2 years ago
Come on its easy money
kirill [66]

Answer:

I don't understand your question

5 0
3 years ago
What is the coefficient of the term x^7y in the expansion of (x+y)^8
jeka57 [31]
Hello,
Please, see the attached file.
Thanks

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Factor completely 4x^2 + 20x. <br> A. 4(x^2 + 5x) <br> B. x(4x + 20) <br> C. 4x(x + 5)<br> D. Prime
Mnenie [13.5K]
C.4x(x+5) it the best answer
7 0
2 years ago
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