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anastassius [24]
3 years ago
13

100 POINTS plz help Chuck drops a rock from a height of 70 m. How long will it take the rock to hit the ground?

Mathematics
2 answers:
elixir [45]3 years ago
7 0

Answer:

3.8 seconds

Step-by-step explanation:

h(t) = −4.9t² + v0t + h0,

0 = -4.9t² + 70

4.9t² = 70

t² = 100/7

t = 3.77964473

lord [1]3 years ago
4 0

Answer:

3.8

Step-by-step explanation:

We are going to plug in the values of the equation, so h(t)=-4.9^2+v0t+h0 will

now be h(t)=-4.9^2+0+70

Now we will find the a b and c of the equation,  a=-4.9 b=0 c=70

Now we must find the discriminant of the equation,  which the equation for that is D=b^2+(-4)(a)(c)

So D=1,372

Now we use the quadratic formula (see picture below for finished product)

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18x=36 with a full explanation and I will give you brainlyest
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Answer:−18x>36

Divide both sides by −18. Since −18 is negative, the inequality direction is changed.

x< −18

36

​

Divide 36 by −18 to get −2.

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Step-by-step explanation:

Hope this helps!

5 0
2 years ago
50 points!!! Basic math!
tangare [24]

Formula for the area of the triangle:

1/2 bh

b = base

h = height

#6.

Area = 36 in²

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#7.

Area = 2 ft²

Height = 1 ft

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2 = 1/2 b

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#8.

Area = 42 in²

Base = 12 in

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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
Read 2 more answers
Slope -1 passes through (7,2)
kvv77 [185]
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slope(m) = -1
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Answer:

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Step-by-step explanation:

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