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pashok25 [27]
4 years ago
9

Help me with this please

Mathematics
1 answer:
charle [14.2K]4 years ago
7 0
(a) Plan b costs more by $10
(b) $275, Plan A will cost more
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In preparation to buy a new video game that cost $65, your friend plans on saving money each month for the purchase of the game.
andreev551 [17]

Answer:

After 20 months

Step-by-step explanation:

This is a compound growth problem which has the formula:

F=P(1+r)^t

Where

F is future value

P is present amount

r is the rate of growth

t is the time (in months)

Future amount is $65, what he needs at-least

P is the initial amount, that is $10

r is the rate of growth, which is 10% or 10/100 = 0.1

t is time in months, what we need to find

Substituting and solving we get:

F=P(1+r)^t\\65=10(1+0.1)^t\\65=10(1.1)^t\\6.5=1.1^t\\ln(6.5)=ln(1.1^t)\\ln(6.5)=t*ln(1.1)\\t=\frac{ln(6.5)}{ln(1.1)}\\t=19.64

<u>He would need 19.64 months to save up at-least 65. So, that means, he would need 20 months</u>

5 0
3 years ago
About what percentage of fresh water fish are in the world
Alex777 [14]
41% are freshwater species, 1% moves back and fourth between salt water and fresh water and 58% are marine <span />
5 0
4 years ago
Read 2 more answers
The figure is made up of two shapes, a semicircle and a rectangle.What is the exact perimeter of the figure?
grandymaker [24]
Perimeter of circular area = πr = 3.14 * 10 = 31.4 mm

Perimeter of rectangular area = 30 + 20 + 30 = 80 mm

Total Perimeter = 80 + 31.4 = 111.4

In short, Your Answer would be 111.4 mm

Hope this helps!
7 0
3 years ago
Read 2 more answers
461 tickets were sold. Students paid $3.50 each while non-students paid $5.50 each. If a total of $1867.50 was collected, how ma
Bess [88]

Answer:

The number of students attended was 334 and the number of non students attended was 127

Step-by-step explanation:

Let

x ----> the number students attended

y ----> the number of non students attended

we know that

x+y=461 ----> equation A

3.50x+5.50y=1,867.50 ----> equation B

Solve the system of equations by graphing

Remember that the solution is the intersection point both graphs

The solution is the point (334,127)

see the attached figure

therefore

The number of students attended was 334 and the number of non students attended was 127

8 0
4 years ago
Factoring quadratics. Not in a rush, but I would appreciate some help on this. It's too late into the day to ask for help from m
Pie

Answer:

  • (y + 10)(2y + 1)

Step-by-step explanation:

<u>Factor the expression:</u>

  • 2y² + 21y + 10 =
  • 2y² + 20y + y + 10 =
  • 2y(y + 10) + (y + 10) =
  • (y + 10)(2y + 1)

4 0
3 years ago
Read 2 more answers
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