3 years ago

If an angle is acute what size could it be

Mathematics

2 answers:

stepan [7]3 years ago

4 0

An acute angle. An acute angle is 90 degrees or less.

Novosadov [1.4K]3 years ago

3 0

An acute angle is 90 degrees or smaller.

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find the sum of a 9-term geometric sequence when the first term is 4 and the last term is 1,024 and select the correct answer be

olasank [31]

Hello,

$u_{1} =4\\
 u_{2} =4*q\\
 u_{3} =4*q^2\\
...\\

 u_{9} =4*q^8\\\\
==\textgreater\ 4*q^8=1024\\
==\textgreater\ q^8=256\\
==\textgreater\ q=2\mbox{( and there is a problem in the question) } \ or \ q=-2\\
if\ q=2 \ then\ \sum_{i=0}^{8}\ 4*(2)^i= 4*\dfrac{1-2^9}{1-2} =2044\\

if \ q=-2 \ then\ \sum_{i=0}^{8}\ 4*(-2)^i= 4*\dfrac{1-(-2)^9}{1+2} =684\\



$

Answer B (but see the problem)

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2 years ago

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What is the volume of a right pyramid with base area B=8ft^2 and height h=12 ft

vivado [14]

Answer:

The volume would be 31 cubic feet.

Step-by-step explanation:

To find this, use the formula for the area of a right pyramid.

A = 1/3bh

A = 1/3(8)(12)

A = 1/3(96)

A = 32

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3 years ago

Calculate the product of and 1/5 +2/9=

Phantasy [73]

$\frac{1}{5}~+~ \frac{2}{9}$

Find the same denominators

$\frac{9}{45}~+~ \frac{10}{45}$

$\frac{9~+~10}{45}$

$\frac{19}{45}$

Answer = $\frac{19}{45}$

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3 years ago

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How do you simplify this?

lions [1.4K]

Answer:

sinA(cosA+sinA)*cosA

Step-by-step explanation:

(sinA(2cosA+sinA-cosA))/secA

sinA(cosA+sinA)/secA

sinA(cosA+sinA)*cosA

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