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3 years ago

What's the area of a circle with a radius of 5?

2 answers:

8 0

First, multiply the radius by itself. 5x5=25. Then multiply by pi, or 3.14. 25x3.14=78.5. The area of the circle is 78.5units^2. Hope this helps! ;)

MrMuchimi3 years ago

8 0

Area=pi times radius²
given that the radius=5 units
area=pi 5²=25pi

area=25pi square units
if we use pi=3.14 aprox then
area=78.5 square units

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Prove that (4n+1)^2(4n-1)^2 is a multiple of 8 for all integers of n. thanks.

azamat

Answer: i think (4n+1)^2(4n-1)^2 isnt a multiple of 8 for all integers of n because:

(4n + 1)²(4n - 1)²

= [(4n + 1)(4n - 1)]²

= (16n² - 1)²

= 16².n².n² - 2.16.n² + 1

= 8n²(32n² - 4) + 1

can see 8n²(32n² - 4) is a multiple of 8 but 1 isnt a multiple of 8

=> (4n + 1)²(4n - 1)² isnt a multiple of 8 for all integers of n.

Step-by-step explanation:

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3 years ago

Solve for x to the nearest 10th. 410 = 1080(0.915)^x

Hunter-Best [27]

Answer:

410/1080=(0.915)^x

0.379=(0.915)^x

ln0. 379/ln0.915=x

X=10.903

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3 years ago

Hatah and his 3 friends are each running an equal part of a la mile race.

Lana71 [14]

Answer:3.5 miles

Step-by-step explanation:

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3 years ago

What’s the answer no links.

lisabon 2012 [21]

Answer:

12÷2?

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3 years ago

LIEDUMICIS.ISLIULIULUI marks 4 1 point → An archer shoots an arrow into the air. The equation that describes the path of the arr

elena55 [62]

the arrow touches the ground when the heigth is 0

so we need to replace h=0 and solve for t

$\begin{gathered} h=17t-5t^2 \\ 0=17t-5t^2 \\ 0=t(17-5t) \\ 0=17-5t \\ 5t=17 \\ t=\frac{17}{5}=3.4 \end{gathered}$

the arrow tuches the ground at 3.4 seconds

$F=m\times a$

replacing

$185=m\times13.7$

solve for m

$\begin{gathered} m=\frac{185}{13.7} \\ \\ m=13.50 \end{gathered}$

the mass is 13.50Kg

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1 year ago