Ask question

Ask question

All categories

3 years ago

15

An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. Es

timate the amount of fabric that the umbrella has.

1 answer:

Angelina_Jolie [31]3 years ago

8 0

The complete question in the attached figure

we know that
[<span>amount of fabric]=8*[area of lateral triangle side]
area of lateral triangle side=(1/2)*4*5----> 10 ft</span>²
so
[amount of fabric]=8*[10]----> 80 ft²

the answer is
80 ft²

You might be interested in

If you have $11 and you spend $7 on a sandwich, drink, and chips, what fraction of your money did you spend?

larisa86 [58]

Answer:

Step-by-step explanation:

u had 11 and u spent 7

7/11 <=== the fraction of money u spent is 7 out of 11

8 0

3 years ago

Read 2 more answers

Jane wishes to bake an apple pie for dessert. The baking instructions say that she should bake the pie in an oven at a constant

Viktor [21]

Answer:

Therefore $k= \frac{ln2 }{18}$ , A=184

Step-by-step explanation:

Given function is

$T(t)=230 -e^{-kt}$

where T(t) is the temperature in °C and t is time in minute and A and k are constants.

She noticed that after 18 minutes the temperature of the pie is 138°C

Putting T(t) =138°C and t= 18 minutes

$138=230 -Ae^{-k\times 18}$

$\Rightarrow -Ae^{-18k}=138-230$

$\Rightarrow Ae^{-18k}=92$ .....(1)

Again after 36 minutes it is 184°C

Putting T(t) =184°C and t= 36 minutes

$184=230-Ae^{-k\times 36}$

$\Rightarrow Ae^{-36k}=230-184$

$\Rightarrow Ae^{-36k}=46$ .......(2)

Dividing (2) by (1)

$\frac{Ae^{-36k}}{Ae^{-18k}}=\frac{46}{92}$

$\Rightarrow e^{-18k}=\frac{46}{92}$

Taking ln both sides

$ln e^{-18k}=ln\frac{46}{92}$

$\Rightarrow -18k =ln (\frac12)$

$\Rightarrow -18k= ln1-ln2$

$\Rightarrow k= \frac{ln2 }{18}$

Putting the value k in equation (1)

$Ae^{-18\frac{ln2}{18}}=92$

$\Rightarrow A e^{ln2^{-1}}=92$

$\Rightarrow A.2^{-1}=92$

$\Rightarrow \frac{A}{2}=92$

$\Rightarrow A= 92 \times 2$

⇒A= 184.

Therefore $k= \frac{ln2 }{18}$ , A=184

7 0

3 years ago

-6-4(3x2)+5^2<br> show step by step pls!

storchak [24]

PEMDAS
-6-4(3x2)+5^2

-6-4(6)+5^2

distribute
-6-24+5^2

-6-24+25= -5

4 0

2 years ago

The least common multiple of 16 and 20 is

meriva

$\displaystyle\\16=2^4\\\\20=2^2\times5\\\\\text{The least common multiple }~=2^4\times5=16\times5=\boxed{\bf80}$

7 0

3 years ago

Read 2 more answers

Which are the partial products for 8x362? Select all that apply.

lisabon 2012 [21]

Answer:

Are you guys classmates?

8 0

2 years ago