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3 years ago

Solid: What is the surface area of the pyramid? 7

Mathematics

2 answers:

telo118 [61]3 years ago

8 0

Answer:

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Step-by-step explanation:

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baherus [9]3 years ago

5 0

Answer:

i am so sorry if its wrong

Each of the triangles making up the sides and base have a base of 8 cm and a height of 6.9 cm. Then the area of the pyramid is that of 4 such triangles.

A = 4×(1/2)×b×h

A = 2×(8 cm)×(6.9 cm)

A = 110.4 cm²Step-by-step explanation:

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The volume of a sphere can be calculated by V = 4/3 * pi If the volume is 113.04 cm ^ 3 what is the radius?

lisov135 [29]

Answer:

2.99 cm

Step-by-step explanation:

V= $\frac{4}{3}$ (pi)(r^3)=113.04cm^3

113.04/ $\frac{4}{3}$ (pi) = r^3 = 26.99

r= $\sqrt[3]{26.99}$ = 2.99cm

3 0

3 years ago

7^2+7^7 answer in exponential form

Helen [10]

It could also be 8.23592 x 10 ^ 5

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3 years ago

Triangle ABC has vertices A(0,0) B(6,8) and C(8,4). Which equation represents the perpendicular bisected of BC?

AveGali [126]

Answer:

$y = \frac{1}{2}x+\frac{5}{2}$

Step-by-step explanation:

The perpendicular bisector of a line passes through the mid-point of the line and the product of slopes of the line and perpendicular bisector will be -1.

So,

$Mid-point\ of\ BC = (\frac{6+8}{2}, \frac{8+4}{2})\\= (\frac{14}{2}, \frac{12}{2})\\= (7,6)$

The line will pass through (7,6)

Now,

$Slope\ of\ BC = m_1 = \frac{y_2-y_1}{x_2-x_1} \\=\frac{4-8}{8-6}\\= \frac{-4}{2}\\= -2$

Let

m_2 be the slope of perpendicular bisector

So,

m_1*m_2 = -1

-2 * m_2 = -1

m_2 = -1/-2 = 1/2

The standard equation of line is:

y=mx+b

Where m is slope

So putting the value of slope and point to find the value of b

$6 = \frac{1}{2}*7 +b\\ 6 = \frac{7}{2} + b\\b = 6 - \frac{7}{2}\\ b = \frac{12-7}{2}\\b = \frac{5}{2}\\So,\ the\ equation\ of\ perpendcular\ bisector\ of\ BC\ is:\\y = \frac{1}{2}x+\frac{5}{2}$

7 0

3 years ago

Chase measured a line to be 8.9 inches long. If the actual length of the line is 9.5 inches, then what was the percent error of

Simora [160]

Answer:

10%

Step-by-step explanation:

In this question, we are asked to calculate the percentage error in a measurement.

This can be obtained by first getting the error involved. That is calculated by Subtracting the value calculated from the actual value. That is 9.5 - 8.9 = 0.6

The percentage error is thus 0.6/9.5 * 100 = 6%

The value is actually 10% to the nearest tenth of a percent

4 0

3 years ago

i need to know this ASAP i dont know how to do this can someone type in the answer step by step please

alexira [117]

M1+m2+m3=180
m5+m6+m7=180
Triangle angle sum theorem
m1+m2+m3=m5+m6+m7
Since m3 is congruent to m5
You can subtract m3 from the left and m5 from the right
m1+m2=m6+m7

3 0

3 years ago