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Doss [256]
3 years ago
6

Mr. Arnold needs to repaint the outside of his house. He estimates that the area he needs to paint is about 1,600 square feet. E

ach gallon of paint will cover about 250 square feet. Mr. Arnold has 1 gallon of paint left over from the last time he painted that he can use this time. Will Mr. Arnold need to buy more than 5 gallons of paint? Use an equation to complete the explanation for your reasoning.
Mathematics
1 answer:
Rom4ik [11]3 years ago
5 0
<span>Area that needs to be painted=1600 sq.ft. 1 gallon of paint covers 250 sq.ft. Total area for which paint needs to be bought=1600-250 sq.ft=1350 sq.ft. [Since, Mr. Arnold already has 1 gallon of paint] Total paint that needs to be bought=1350/250=5.4 gallons Alternatively, Total paint required=(Area to be painted/Coverage of 1 gallon of paint)-1 [Since, Mr. Arnold already has 1 gallon of paint] Total paint required= (1600/250)-1 gallons =6.4-1 gallons=5.4 gallons of paint is required</span>
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Why do you add a zero when multiplying two digits by two digits
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When you add a zero to the problem, it shows you are now multiplying in the double-digits. Let's say you are multiplying 12x12. First you cover up the one then multiply them. Then cover up the two and you have 10. When you multiply them, it ends in a zero. Don't think of it as adding a zero but adding to products.
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150% of what number is 34
Svetradugi [14.3K]
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6 0
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What is the approximate volume of a cylinder with a diameter of 12 meters and a height of 7 meters? Use 3.14 for pi.
kkurt [141]
V=\pi r^2 h
r - radius, h - height
The diameter is twice the radius.

d=12 \ m \\&#10;r=\frac{12}{2} \ m = 6 \ m \\&#10;h=7 \ m \\ \\&#10;V=\pi \times 6^2 \times 7=\pi \times 36 \times 7=252 \pi \approx 252 \times 3.14=791.28 \approx 791.3

The answer is c. 791.3 m³.
3 0
3 years ago
You have $5,000 to invest for ten years. The Bank pays simple interest at an annual rate of 5%. Calculate your balance after 10
Mazyrski [523]

Answer: $7,500

Step-by-step explanation:

Use the formula: SI = P(1 + rt)

SI = 5000(1 + 0.05[10])

SI = 5000 + 2500

SI = $7,500

After 10 years, your balance should be $7,500

3 0
2 years ago
The cost per week of running a boarding house is partly constant and partly
patriot [66]

Answer:

the cost of running the boarding

house for 600 students is N61,000

Step-by-step explanation:

Let C represents cost

K1 represents first constant

K2 represents second constant

C= k1+k2n

3500 = k1 + 25 k2............. Eqn(1)

6000= k1 + 50 k2 .............. Eqn(2)

Subtract eqn(1) from eqn(2)

2500= 25k2

K2= 2500/25

K2= 100

To get k1 from eqn(1)

3500 = k1 + 25 k2

Substitute the value of k2

3500 = k1 + 25 (100)

3500= k1 +2500

K1= 3500- 2500

K1= 1000

The equation connecting them;

C= 1000+ 100n

The cost of running the boarding

house for 600 students is

n= 600

C= 1000+ 100(600)

C= 1000+60000

C= N 61,0000

6 0
3 years ago
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