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Alina [70]
3 years ago
9

If an object is dropped from 100 feet in the air and air resistance is ignored, the object will fall at a rate that can be model

ed by the function h(t) = -16t? + 100. After how many seconds is the object 20 feet from theground?
Mathematics
1 answer:
ELEN [110]3 years ago
6 0

every foot is a second hope that helps

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Help me please!!!:):)
katovenus [111]

Answer:

4/7x310=177 1/7

8/8x310=310

1 1/6x310=361 2/3

Step-by-step explanation:

Hope THis Helps :)

7 0
3 years ago
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R-12 evaluate if r= 7
lara [203]

r-12
substitute in r=7
so 7-12 = -5

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3 years ago
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50 points!!! Basic math!
tangare [24]

Formula for the area of the triangle:

1/2 bh

b = base

h = height

#6.

Area = 36 in²

Base = 18 in

36 = 1/2(18)h

36 = 9h

36 ÷ 9 = h

4 = h

height = 4 in

#7.

Area = 2 ft²

Height = 1 ft

2 = 1/2 b (1)

2 = 1/2 b

2 ÷ 1/2 = b

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#8.

Area = 42 in²

Base = 12 in

42 = 1/2 (12) h

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42 ÷ 6 = h

7 = h

Height = 7 in

Notice that the answers have no exponents (²). That is because they are used only on the area of shapes as units.

Since you find the area by multiplying things together, for example x · x = x², the exponent is there.

You do not need to worry about this being in the calculation. This will just be in units such as:

cm²

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in²

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Just remember to use these exponents in the units for the areas.

7 0
3 years ago
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ABCEDEFGH is a regular octagon. The minimum degree of rotation by which this octagon can map onto itself is . It will take incre
Mrrafil [7]

Answer:

45 or multiples of 45 around the centre of octagon

Step-by-step explanation:

Given that ABCDEFGH is a regular octagon.  i.e. it has 8 sides.

Since regular ocagon, all interior angles would be equal.

Sum of all interior angles of octagon = 2(8)-4 right angles

= 12 right angles

Hence each angle = 12(90)/8 = 135 degrees

Thus the octagon when rotated will take the same shape if vertices interchange also due to the property that all sides and angles are equal

Since each angle is 135 imagine an octagon with one vertex at origin O, and adjacent vertex B on x axis.   OB has to be coincident with BC the next side or the previous side to get it mapped onto itself

The centre will be at the middle with each side subtending an angle of 45 degrees.

Hence if rotation is done around the centre with 45 degrees we will get octagon mapped onto itself.

45, 90, 135 thus multiples of 45

8 0
3 years ago
Can I get help with this? Thanks! :)
ycow [4]

Answer:

The answer is 17

Step-by-step explanation:

8^2+15^2=c^2

64+225=c^2

289=c^2

Square root both sides

c=17

8 0
3 years ago
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