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SIZIF [17.4K]
3 years ago
13

What the surface area

Mathematics
1 answer:
RideAnS [48]3 years ago
8 0
The surface area of what?
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Data for the estimated number of HIV cases worldwide between 1988 and 1996 suggests exponential growth in the number of cases ov
Eduardwww [97]

Answer:

d. 52.5 million cases

Step-by-step explanation:

from the data output in the question, we have the regression equation to be

log y = -151.281 + 0.076577x

y is the number of hiv cases which is in millions

x is the year of the hiv case

x = 1998

we put the value of x in the regression equation

log y = -151.281 + 0.076577(1998)

log y = -151.281 + 153.000846

log y  = 1.719846

since the result is in log form,

y=10^{1.791846}

y = 52.5 million cases

3 0
3 years ago
Find the surface area of a cylinder with a base diameter of 6 yd and a height of 5 yd
Morgarella [4.7K]
To find the top and bottom circles you use:
2(pi x r^2)
- your r (radius) is half of the diameter so 3.

To find the part around it you use:
2 x pi x r x height

Circles: 2(pi x 3^2) = 56.5487
Rectangular around: 2 x pi x 3 x 5 = 94.2478

- then add them together
56.5487 + 94.2478 = 150.7965 yards^2

5 0
3 years ago
8. myles had 103 coins in a jar - all nickels, dimes, and quarters. if the total value of the coins is $15
Ivanshal [37]

If the total value of the coins is $15. The number of each type of coin is: 31 quarters, 72 dimes.

<h3>Number of each type of coin</h3>

Let D = number of dimes

Let Q = the number of quarters

Equations

d + q = 103

0.10d + 0.25q = 15  

d = 103 -q

0.10(103 -q) + 0.25q = 15

10.3 - 0.10q + 0.25q = 15

0.15q = 4.7

q=4.7/0.15

q=31 quarters

Substitute q into second equation

D+31=103

D=72 dimes

Therefore the number of each type of coin is: 31 quarters, 72 dimes.

Learn more number of each coin here:brainly.com/question/13934075

#SPJ1

5 0
2 years ago
A city water company charges homeowners based on how much water they use in thousands of gallons. The company progressively char
Dima020 [189]

Answer:

  • 1700: $50
  • 2000: $60
  • 7000: $90

Step-by-step explanation:

You can read the answers from the graph. Find the usage on the horizontal scale, and look at the vertical scale to find the corresponding charge.

__

<h3>1700 gallons</h3>

The value 1700 is between 1000 and 2000, so will be between 1 and 2 on the horizontal scale. The graph is flat in that region. The charge is $50.

__

<h3>2000 gallons</h3>

The graph has a jump at 2 on the horizontal scale. The solid dot tells you that the charge is $60.

__

<h3>7000 gallons</h3>

At 7 on the horizontal scale, the graph is increasing from 80 to 100. At 7000 gallons, the line passes through the grid intersection indicating the charge is $90.

4 0
2 years ago
I’ve looked at this for a while, can someone clear up the answers for me? I can’t figure it out.
navik [9.2K]
What answers? I don't see any
4 0
3 years ago
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