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Sergeeva-Olga [200]
3 years ago
10

A construction crew needs to close 75% of a 5-mile road while they do construction. How much of the road is closed,

Mathematics
1 answer:
gulaghasi [49]3 years ago
4 0

Answer:

6

Step-by-step explanation:

I did .75 x 5 to get 75% of the road. I then converted the amount into kilometers using a reliable converter. I got 6 kilometers then.

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Two similar cylinders have radii of 15 inches and 6 inches. What is the ratio of the surface area of the small cylinder to the s
Levart [38]

Answer:

4:25

Step-by-step explanation:

Given that,

r₁ = 15 inches, r₂ = 6 inches

The area of the cylinder is given by :

A=2\pi rh+2\pi r^2

The ratio of surface areas of two cylinders,

\dfrac{S_2}{S_1}=\dfrac{2\pi r_2h_2+2\pi r_2^2}{2\pi r_1h_1+2\pi r_1^2}\\\\\dfrac{S_2}{S_1}=(\dfrac{r_2}{r_1})^2\\\\=\dfrac{6}{15}^2\\\\=\dfrac{4}{25}

Hence, the required ratio is 4:25.

8 0
3 years ago
What is the expanded form for 602,050,123
Fudgin [204]
600000000+2000000+50000+100+20+3
3 0
2 years ago
In the year 2000, the United States had a population of about 281.4 million people; by 2010, the population had risen to about 3
IgorC [24]

Answer:

Part 1. 0.9259 % per year

Part 2. P = 281.4e^(0.009 259t); 338.6 million  

Step-by-step explanation:

Data:

P₀ = 281.4 million

P  = 308.7 million

Part 1. Growth rate

t = 2010 - 2000 = 10 yr

        P = P₀e^(rt)

308.7 = 281.4e^(10r)

e^(10r) = 1.0970

     10r = ln1.0970

        r = (ln1.0970)/10 = (0.092 59)/10 = 0.009 259  

        r = 0.9259 % per year

The 10-year continuous growth rate is 0.9259 % per year.

Part 2. Population model

The population model is

P = 281.4e^(0.009 259t)

where P is in millions and t is the number of years since 2000.

By 2020,

P = 281.4e^(0.009 259 × 20) = 281.4e^0.1852 = 281.4 × 1.203

P = 338.6 million

The estimated population in 2020 is 338.6 million.

8 0
3 years ago
A pack of five basic solid T-shirts costs $29.95 in a store. The sales tax where they are sold is 7.75%. What is the unit cost o
Anna71 [15]

Answer:

6.45

Step-by-step explanation:

29.95+7.75%=32.27

32.27/5

6.45

3 0
2 years ago
Read 2 more answers
The sum of eleven and a number is negative nine.
Misha Larkins [42]

Answer:

The sum is 2. ...........

8 0
2 years ago
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