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Korvikt [17]
3 years ago
7

Raj opens his bank account with $500. He deposits $40 each month. A) write a function that shows the amount in Raj's account aft

er m months. B) after how many months will Raj have $780 in his bank account?
Mathematics
1 answer:
Anettt [7]3 years ago
3 0
Answer to B) is 7 months. Don’t quite understand A) though. More information about how many months you have to show for, would be quite helpful:)
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The circumference of a flower garden is 247 ud. What is the area of the flower garden in terms of
lisov135 [29]

Answer:15252.25π^3

Step-by-step explanation:

Radius=r

Circumference=247 ud

Circumference=2 x π x r

247=2πr

Divide both sides by 2π

247/2π=2πr/2π

123.5π=r

Radius=123.5π

Area of circle=π x r x r

Area of circle=π x 123.5π x 123.5π

Area of circle=15252.25π^3

4 0
3 years ago
Suppose that 80% of all trucks undergoing a brake inspection at a certain inspection facility pass the inspection. Consider grou
Gwar [14]

Answer:

P=0.147

Step-by-step explanation:

As we know 80% of the trucks have good brakes. That means that probability the 1 randomly selected truck has good brakes is P(good brakes)=0.8 . So the probability that 1 randomly selected truck has bad brakes Q(bad brakes)=1-0.8-0.2

We have to find the probability, that at least 9 trucks from 16 have good brakes, however fewer than 12 trucks from 16 have good brakes. That actually means the the number of trucks with good brakes has to be 9, 10 or 11 trucks from 16.

We have to find the probability of each event (9, 10 or 11 trucks from 16 will pass the inspection) .  To find the required probability 3 mentioned probabilitie have to be summarized.

So P(9/16 )=  C16 9 * P(good brakes)^9*Q(bad brakes)^7

P(9/16 )= 16!/9!/7!*0.8^9*0.2^7= 11*13*5*16*0.8^9*0.2^7=approx 0.02

P(10/16)=16!/10!/6!*0.8^10*0.2^6=11*13*7*0.8^10*0.2^6=approx 0.007

P(11/16)=16!/11!/5!*0.8^11*0.2^5=13*21*16*0.8^11*0.2^5=approx 0.12

P(9≤x<12)=P(9/16)+P(10/16)+P(11/16)=0.02+0.007+0.12=0.147

7 0
2 years ago
Which of the following mapping diagrams does not represent a function?
Tamiku [17]

Answer:

you'll have to add the answer choices because we can't see what the choices are!

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Maggie's brother is 4 years younger than three times her age. The sum of their ages is 20. How old is Maggie?
makkiz [27]
Maggie would be 6

6•3=18
18-4=14
14+6=20
6 0
3 years ago
Which number is a solution of the inequality
SashulF [63]

x(7-x)-8>8-8

x(7-x)-8>0


8 0
3 years ago
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