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adelina 88 [10]
3 years ago
14

In an A.P., if the first term is 22, the common difference is -4, and the sum is 64, find n​

Mathematics
1 answer:
weqwewe [10]3 years ago
6 0

Answer:

3 + 6 + 12 + 24 + 48 + 96 + 192 + 384 = 765

Step-by-step explanation:

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A circle has a circumfernce of 13 it has a arc length of 11. What is the central angle of the arc in degrees
tatiyna

Answer: 304.6°

Step-by-step explanation:

First of all, using the circumference of the circle formula to find the radius of the circle.

Circumference of the circle = 13, ie

2πr = 13,

r = 13/2π ---------------------------- 1

Now getting the radius of the circle now, you now substitute for this in the formula for finding the length of an arc to get the central angle.

Arc length = 11 , ( 2πr0°/360) or (πr0°/180), so

πr0°/180 = 11 ------------------------ 2

Now solve for 0°, the central angle of the angle by making it the subject of the formula.

πr0° = 180 x 11

0° = 180 x 11

----------- ----------------- 3

πr

Now, put equation 1 in equation 3 and solve.

0° = 1980

--------

π x 13/2π

= 1980 x 2π

-----------

π.x. 13

= 1980 x 2

----------

13

= 3960/13

= 304.6°

Therefore, the central angle of the arc is 304.6°

Please be meticulous and understand the way I change the r in the denominator. It was the rule in fraction when dividing.

5 0
3 years ago
Which graph represents the following piecewise defined function?
Viktor [21]

Answer: is B

Step-by-step explanation:

on edge 2020

3 0
2 years ago
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Can you please help me with 1-12? Thank you
Marysya12 [62]

Answer:

1. 18.84 in

2. 56.52 cm

Step-by-step explanation:

The circumference of a circle is the distance around the circle. Its found using the formula C = πd or C=2πr. The variable d represents the diameter or the distance from one edge of the circle to the other through the cent. The variable r represents the radius of a circle or the distance from one edge to the center. Use the formula by substituting a diameter or radius then simplify.

1. C = πd = π(6) = 3.14(6) = 18.84 in

2. C = 2πr = 2(3.14)(9) = 56.52 cm

6 0
3 years ago
you have $20 to spend at the snack bar all the snacks at the snack bar cost $1.25 how much money will you have left if you buy 1
Dominik [7]
You will have $5 left because if you spend 1.25 on 12 snacks you will spend $15
6 0
3 years ago
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If Sally earned $630 in interest when investing $1200 at a rate of 15% per year, how many years have passed?
jasenka [17]
630/1200*0.15=3.5.........
5 0
3 years ago
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