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alex41 [277]
3 years ago
5

If there are 33 students in a classroom and the ratio from boys to girls is 3:8 how may boys are in the classroom?

Mathematics
2 answers:
slava [35]3 years ago
8 0
9 boys are in the classroom.
natita [175]3 years ago
4 0
3:8 = 33

3x+8x=33
11x=33
x=3

3x=3(3)=9 boys
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qaws [65]

The value of $500 after four years is $610

<u>Step-by-step explanation:</u>

It is given that, the value of $500 increases at a rate of 5% per year.

The exponential formula is given by y = ab^{x}.

where,

  • a is the initial  amount.
  • b is the growth factor .

The growth factor b is replaced by either (1 + r) or by (1 - r).

where, r is the rate per year.

b= (1+r) represents the increase in growth rate.

b= (1-r) represents the decrease in growth rate.

Here, the growth rate is increased. So the formula is given by y = a(1+r)^{n}

where,

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  • Number of years, n= 4.
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<u>To find y value :</u>

⇒ y = 500(1+0.05)^{4}

⇒ y = 500 (1.05)^{4}

⇒ y = 500 \times 1.22

⇒ y = 610

 Therefore, the value of the item after four years is $610.

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Parallelogram with vértices (-10,7) , (7,-4), and (-10,-2)
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