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2 years ago

A student is making a model of the famous Giza pyramid,

Mathematics

2 answers:

harkovskaia [24]2 years ago

8 0

Answer:

Choose the option D

NikAS [45]2 years ago

8 0

I think it’s B. The original model has 4 sides and it wouldn’t make sense to increase the number of sides for its replica. It would still have 4 sides but in a smaller scale.

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When a volcano erupts, the height of the peak is reduced and the upper portion is removed. The height of a volcano after it eru

ANTONII [103]

Answer:

9670 feet

Step-by-step explanation:

The height given (8219.5 ft) is 85% OF ORIGINAL, hence original is much higher. But how do we figure this out?

we translate word problem to equation.

8219.5 IS 85% of TOTAL

Firstly, 85% = 85/100 = 0.85

Remember, is means =

of means multiplication

So we have:

8219.5 = 0.85 * Total

Hence, total = [let total be 7]

8219.5 = 0.85 * t

t = 8219.5/0.85 = 9670 feet

4 0

3 years ago

13 units find area of sector EFG.

s2008m [1.1K]

Answer:

picture? (170

Step-by-step explanation:

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3 years ago

One more than three times a number is less than the number decreased by five. solve and graph

Genrish500 [490]

Whats the graph ??
i need it to find the answer

4 0

3 years ago

If sin(x) = 5/13, and x is in quadrant 1, then tan(x/2) equals what?

Rufina [12.5K]

$x$ is in quadrant I, so $0$ , which means $0$ , so $\dfrac x2$ belongs to the same quadrant.

Now,

$\tan^2\dfrac x2=\dfrac{\sin^2\frac x2}{\cos^2\frac x2}=\dfrac{\frac{1-\cos x}2}{\frac{1+\cos x}2}=\dfrac{1-\cos x}{1+\cos x}$

Since $\sin x=\dfrac5{13}$ , it follows that

$\cos^2x=1-\sin^2x\implies \cos x=\pm\sqrt{1-\left(\dfrac5{13}\right)^2}=\pm\dfrac{12}{13}$

Since $x$ belongs to the first quadrant, you take the positive root ( $\cos x>0$ for $x$ in quadrant I). Then

$\tan\dfrac x2=\pm\sqrt{\dfrac{1-\frac{12}{13}}{1+\frac{12}{13}}}$

$\tan x$ is also positive for $x$ in quadrant I, so you take the positive root again. You're left with

$\tan\dfrac x2=\dfrac15$

4 0

3 years ago

Write the numerical expression in words two different ways. 7/ (10-3)

MissTica

Answer:

seven divided by the difference of ten and three

seven over the difference of ten and three

3 0

3 years ago