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Vladimir79 [104]
3 years ago
6

Can someone please check my answers I WIILL GOVE BRAINLY TO FIRST PERSON THAT ANSWERS!

Mathematics
1 answer:
Rainbow [258]3 years ago
5 0
The first is C. r = 4(4/9)
the second one is B. h = 130
the second one is A. k = 7

i’m so sorry, they’re all wrong
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The formula for finding the length of an arc on a circle is L=2πr(x360) , where r is the radius of the circle and x is the measu
horrorfan [7]

The formula for length of an arc on a circle is given by the formula:

L = \frac{2 \pi rx}{360},

where 'r' is the radius of the circle and 'x' is the measure of the central angle of the arc.

We have to determine the value of radius 'r'.

Since, L = \frac{2 \pi rx}{360}

By Cross multiplication, we get

360 \times L = 2 \pi rx

\frac{360 \times L}{ 2 \pi x} =r

\frac{180 \times L}{ \pi x} =r

r = \frac{180L}{ \pi x}

Therefore, the radius 'r' is given by r = \frac{180L}{ \pi x}.

Option 4 is the correct answer.

6 0
3 years ago
Read 2 more answers
Jessica has money in two savings accounts. One rate is 11% and the other is 14%. If she has $300 more in the 14% account and the
Gelneren [198K]

Answer:

  • $272 was invested in the  savings account at 11%
  • $572  was invested in the  savings account at 14%

Step-by-step explanation:

Let the amount in the savings account with 11% interest =x

She has $300 more in the 14% account.

Therefore amount saved at 14%=x+300

Simple Interest= Principal X (Rate/100) X Time

Since, the time is not given, we assume an annual interest.

Therefore, Time =1 Year

Total Interest = $110

Now, our total interest will be a sum of the interest earned at 11% and the interest earned at 14%.

110=(x*0.11*1)+[(x+300)*0.14*1]\\110=0.11x+0.14x+42\\110=0.25x+42\\\text{Subtract 42 from both sides}\\110-42=0.25x+42-42\\68=0.25x\\\text{Divide both sides by 0.25 to obtain x}\\\frac{68}{0.25} =\frac{0.25x}{0.25} \\x=\$272

Therefore:

  • $272 was invested in the  savings account at 11%
  • $572  was invested in the  savings account at 14%

Cheers!

6 0
3 years ago
en una carrera de 5 vueltas de la F1 online el jugador 1 consigue un tiempo de 2,32 minutos y el jugador 2 consigue 18 segundos
Svet_ta [14]

Answer:

La diferencia del tiempo total de carrera entre el jugador 1 y 2 es 0.0\overline 3 minutos

Step-by-step explanation:

Primera vuelta;

El tiempo de vuelta del jugador 1 = 2,32 minutos

El tiempo de vuelta del jugador 2 = 18 segundos más que el del jugador 1

Por lo tanto, el tiempo de vuelta del jugador 2 = (2,32 + 18/60) minutos = 2,62 minutos

Segunda vuelta

El tiempo de vuelta del jugador 1 = 2,52 minutos

El tiempo de vuelta del jugador 2 = 20 segundos menos que el del jugador 1

Por lo tanto, el tiempo de vuelta del jugador 2 = (2.52 - 20/60) minutos = 2.18\overline 6 minutos

Tercera vuelta

El tiempo de vuelta del jugador 1 = 2,18 minutos

El tiempo de vuelta del jugador 2 = 2,18 minutos

El tiempo de vuelta total del jugador 1 = (2,32 + 2,52 + 2,18) minutos = 7,02 minutos

El tiempo de vuelta total del jugador 2 = (2,62 + 164/75 + 2,18) minutos = 524/75 minutos = 6.98\overline 6 minutos

La diferencia del tiempo total de carrera = (7.02 - 524/75) minutos = (1/30) minutos = 0.0\overline 3 minutos

5 0
2 years ago
How many more equal angles does a square have than a rectangle?
Doss [256]
2 equal angles is the correct answer
3 0
3 years ago
Three sections of a fence need to be painted. Each section of the fence is made of 4 equal-sized boards. Alex paints 1/6 of the
zepelin [54]
Part A:

Total boards = 3 sections of 4 boards = 12 boards

Alex paints: 1/6 of 12 boards = 2 boards

Bobby paints: 2 x Alex = 1/3 of 12 boards = 4 boards

Charles paints: 1 board

David paints: 12 - (Alex + Bobby + Charles) = 12 - 7 = 5 boards

-This means that David painted the largest part of the fence

Part B:

The fraction of the fence that David painted = 5 boards /12 total boards = 5/12
3 0
3 years ago
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