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2 years ago

Could some pls help me!

Mathematics

1 answer:

Aleonysh [2.5K]2 years ago

5 0

39.95 + 9.80 = 49.75

70.23 - 49.75 = 20.48

20.48 / 0.32 = 64

The truck was driven 64 miles.

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Mrs. Chen's students are making and decorating gift boxes for a nursing home. If the boxes are 7 inches wide, 7 inches long, and

pishuonlain [190]

Answer:

$84\text{ in}^2$ .

Step-by-step explanation:

We have been given that Mrs. Chen's students are making and decorating gift boxes for a nursing home. The boxes are 7 inches wide, 7 inches long, and 7 inches high. We are asked to find the amount of cardboard that is needed for each box.

We will use surface area of cuboid formula to solve our given problem.

$SA=2(lw+lh+hw)$ , where,

l = Length,

w = Width,

h = Height

$SA=2(7\text{ in}\cdot7\text{ in} +7\text{ in}\cdot7\text{ in}+7\text{ in}\cdot7\text{ in})$

$SA=2(14\text{ in}^2+14\text{ in}^2+14\text{ in}^2)$

$SA=2(42\text{ in}^2)$

$SA=84\text{ in}^2$

Therefore, Mrs Chen needs 84 square inches of cardboard.

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2 years ago

The lateral surface area of a cylinder is given by the formula S= 2πrh. Solve the equation for r.

alukav5142 [94]

Answer:

Well, with the info I have been given I would say; The L.A of a cylinder is SA+=2(pi)(r)(h).

Step-by-step explanation:

SA=Surface Area

LA=Lateral Area

Pi=3.14

R=Radius

H=Height

V=Volume

LA=2*pi*r*h <-- finds the Lateral Area of a cylinder

SA=LA+2*base or SA=2*pi*r*h+2*pi*r^2<-- finds the Surface Area of a cylinder

V=pi*r^2*h<---- Finds volume of the cylinder

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2 years ago

Jasmine left the house at 7:10 am to go to work. She gets back at 6:35 pm. How long is she out of the house?

Minchanka [31]

11 hours, 15 minutes

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2 years ago

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Angela practiced piano for 2 1/2 hours on friday, 2 1/3 hours on saturday, and 3 2/3 hours on sunday. how much time did angela p

ladessa [460]

2 1/3 + 3 2/3 = 6 hours total practiced

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2 years ago

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Pls help this is past due and I have no idea on how to do it

hram777 [196]

Answer:

42.3

Step-by-step explanation:

Substitute in values
$3.6\times (3)+4.5\times (7) = 10.8+31.5=42.3$

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1 year ago