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2 years ago

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The number of cases of a new diease can be modeled by the quadratic

1 answer:

Arada [10]2 years ago

5 0

Step-by-step explanation:

The number of cases of a new disease may be modeled by the quadratic regression equation y=-2x^2+44x+8 , what is the best prediction for the number of cases after 20 years ( the carrot symbol (^) means the following number is the exponent)

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PLEASE HELP! WILL GIVE 70 POINTS!!

Tresset [83]

Answer:

$A=189\ mm^2$

Step-by-step explanation:

<u>Surface Areas </u>

Is the sum of all the lateral areas of a given solid. We need to compute the total surface area of the given prism. It has 5 sides, two of them are equal (top and bottom areas) and the rest are rectangles.

Computing the top and bottom areas. They form a right triangle whose legs are 4.5 mm and 6 mm. The area of both triangles is

$\displaystyle A_t=2*\frac{b.h}{2}=b.h=(4.5)(6)=27 mm^2$

The front area is a rectangle of dimensions 7.7 mm and 9 mm, thus

$A_f=b.h=(7.5)(9)=67.5 \ mm^2$

The back left area is another rectangle of 4.5 mm by 9 mm

$A_l=b.h=(4.5)(9)=40.5 \ mm^2$

Finally, the back right area is a rectangle of 6 mm by 9 mm

$A_r=b.h=(6)(9)=54 \ mm^2$

Thus, the total surface area of the prism is

$A=A_t+A_f+A_l+A_r=27+67.5+40.5+54=189\ mm^2$

$\boxed{A=189\ mm^2}$

4 0

3 years ago

The mass of the moon is about 7.3 x 10^22 kg It would take approximately 26,000,000 moons to equal the mass of the sun. Determin

zimovet [89]

7.3 x 10^22 x 26,000,000=1.898x10^30
Mass of the sun= 1.898 x 10^30

4 0

3 years ago

What is the surface area of the figure? width = 4.2 ft length = 7.8 ft height = 2 ft

Bond [772]

The surface area is 113.52 feet^2

3 0

3 years ago

Read 2 more answers

One fourth of a number is 5. find the number

Tems11 [23]

Hope this helps. Please mark brainliest

Answer: 20

let the number be x

1/4 x = 5

x=5*4

x=20

5 0

3 years ago

Read 2 more answers

Lines g,h, and i are all parallel and m------->1 =55*

Hunter-Best [27]

It would be C:55,
hope this helps u out

7 0

3 years ago