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3 years ago

I don't know how to do any of this

Mathematics

1 answer:

kupik [55]3 years ago

8 0

For the pyramids, use the formula:(length)(length)(base)(1/3)

For the cones, use the formula: (length of circle/2)²(3.14)(height)(1/3)

So just plug in the numbers into these formulas.

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Stephen and Alice are both reading the same book for a book club. Stephen reads 278 pages in 7 weeks. Alice reads 31 pages each

zhenek [66]

Answer:
8 5/7
Step-by-step explanation:
278/7 = 39 5/7
39 5/7 - 31 = 8 5/7

3 0

3 years ago

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An object is thrown straight up from the top of a 100-foot platform at a velocity of 48 feet per second. The height h(t) of the

julsineya [31]

Answer:

The maximum height is 136 ft

The time it takes to achieve this height is 1.5 s.

Explanation:

1. Function for the height (given):

$h(t)=-16t^2+48t+100$

2. Type of function

That is a quadatic function, whose graph is a parabola that opens downward.

The maximum of the function, i.e. the maximum height, is the vertex of the parabola.

The vertex of a parabola with the genral equation $y=ax^2+bx+c$ is at the x-coordinate

$x=-b/(2a)$

3. Time to achieve the maximum height

Substitute b with 48 and a with - 16:

$t=-48/(2(-16))=48/32=3/2=1.5$

Then, time when the object achieves the maximum height it 1.5s

4. Maximum height:

Replace t with 1.5 in the equation, to find the maximum height, h(1.5)

$h(1.5)=-16(1.5)^2+48(1.5)+100=136$

Then, the maximum height is 136 ft

3 0

3 years ago

62,000 is 1/10th of

djyliett [7]

Answer:

Should be 620,000

Step-by-step explanation:

5 0

3 years ago

Why does -30 - - 50 equal 20? What steps are being done?

ale4655 [162]

Two negatives equal a positive, so its just like subtracting 50 and 30, but your answer will be a positive.

6 0

3 years ago

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Help plz will mark brainliest :)

avanturin [10]

Answer:

Step-by-step explanation:

subtract b from both sides

divide by x

5 0

3 years ago