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Ostrovityanka [42]
3 years ago
8

Mike earned $67.00 in simple interest on an investment of $2800 after 9 months. What is the interest rate?

Mathematics
1 answer:
lawyer [7]3 years ago
5 0

Answer:

0.2659%

Step-by-step explanation:

r = (1/t)(A/P - 1)

r = (1/9)((2867/2800) - 1) = 0.00265873

r = 0.00265873

R = 0.00265873 * 100 = 0.2659%/month

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3 years ago
50= p• 0.05•2<br> Solve
Mariana [72]

Answer:

P=500

Step-by-step explanation:

My reasoning is multiply 0.05 and 2 and you get 0.1. Then you divide 0.1 out of 50 and get 500. Too check the answer you take 500 and multiply it by 0.05 and then  multiply it by 2 and you should get an answer of 50 like it says in the equation.

3 0
3 years ago
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A bag contains pennies, nickles, dimes, and quarters.There are 50 coins in all. Of the coins, 10% are pennies and 32% are dimes.
ikadub [295]
10 pennies, 16 dimes, 19 nickles.
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8 0
3 years ago
The diagram shows the cross-section of a wall of a cinema. It has to be painted. Work out the area that needs to be painted.
mestny [16]

Answer:

Area = 370 m²

Cost to paint = £105

Step-by-step explanation:

Area of the wall of a cinema hall = Area of a trapezoid (1)+ Area of a rectangle (2) + Area of a trapezoid (3)

Area of a trapezoid = \frac{1}{2}(b_1+b_2)h

where b_1 and b_2 are the parallel sides and h is the distance between these sides.

Area of trapezoid (1) = \frac{1}{2}(11+12)\times 6

                                  = 69 m²

Area of the rectangle (2) = Length × Width

                                         = 12 × 15

                                         = 180 m²

Area of the trapezoid (3) = \frac{1}{2}(12+10)\times 11

                                         = 121 m²

Now area of the wall = 69 + 180 + 121

                                   = 370 m²

One tin covers the area = 25 m²

Number of tins required to paint the wall = \frac{\text{Total area}}{\text{Area covered by one tin}}

= \frac{370}{25}

= 14.8

Therefore, number of tins to be purchased = 15

Cost to paint the complete wall = 15 × £7

                                                       = £105

8 0
3 years ago
Find the restricted values of x -7x/7x^2+x
Vera_Pavlovna [14]

Answer:

2x

Step-by-step explanation:

4 0
3 years ago
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