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Helga [31]
3 years ago
15

Pls help i will give brainliest

Mathematics
2 answers:
Flura [38]3 years ago
5 0
The answer is c. 28.26 cm^2
ryzh [129]3 years ago
3 0

Answer:

28.26

Step-by-step explanation:

A

=

π

r

2

=

π

·

3

2

≈

28.27433

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. Find the sum of the geometric sequence. (1 point) 1, one divided by four, one divided by sixteen, one divided by sixty four, o
il63 [147K]

Answer:

0.332

Step-by-step explanation:

given series

1/4, 1/16,1/64.1/256

this is geometric series

where common ratio   r is given by

nth term/ (n-1)th term

let the second term is nth term and first term is (n-1)th term

r = 1/16 / (1/4) = 1/4

___________________________________________

sum of series is given by

a (1-r^n)/1-r

where a is first term

n is the number of terms

r is the common ration

___________________________________________

in the given series

1/4, 1/16,1/64.1/256

a = 1/4

r = 1/4

n = 4

thus ,

sum = 1/4(1-(1/4)^4)/ (1-1/4)

sum = 1/4(1-(1/256)/(4-1)/4

sum = 1/4((256-1)/256 / 3/4

1/4 in numerator and denominator gets cancelled

sum =( 255/256*3) = 255/768 = 0.332

Thus, sum of series is 0.332.

8 0
3 years ago
Read 2 more answers
A horticulturist conducted an experiment on 110 thirty-six inch plant boxes to see if the amount of plant food given to the plan
djyliett [7]

Skejsbssbdgdhdhjslslakasksnshshsksisikssjsjsjjsjsjsjsjss

8 0
3 years ago
How to determine a perfect square trinomial
AfilCa [17]

Answer:

Check whether the first and last terms of the trinomial are perfect squares.

Multiply the roots of the first and third terms together.

Compare to the middle terms with the result in step two

If the first and last terms are perfect squares, and the middle term’s coefficient is twice the product of the square roots of the first and last terms

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Simplify Rewrite the expression in the form 6^-6/6^-5
hodyreva [135]

Answer:

6^-1

Step-by-step explanation:

6 0
2 years ago
The width of a rectangle is 7 inches less than its length. The area of the rectangle is 120 square inches. Solve for the dimensi
lukranit [14]
A) w + 7 = L
B) w * L = 120
A) w = L -7 then substituting this into B)
(L-7) * L = 120
L² -7L = 120
L² -7L -120 = 0
Solving by quadratic Formula:
L1 = 15 
L2 = -8

If length = 15, then width = 8




4 0
3 years ago
Read 2 more answers
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