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mixas84 [53]
3 years ago
7

87% of 41 is what please wright back

Mathematics
1 answer:
andrew-mc [135]3 years ago
3 0
Simple, take 87% and change it into 0.87

Thus,

n=0.87*41

n=35.67

Thus, your answer, is 35.67
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Answer each question with a fraction.
otez555 [7]

Answer:

The average speed is \frac{3}{35}\frac{ft}{min}

Step-by-step explanation:

we know that

To find out the average speed divide the distance by the time

Let

s -----> average speed

d -----> the distance in feet

t ----> the time in minutes

s=\frac{d}{t}

we have

d=6\ ft

t=70\ min

substitute

s=\frac{6}{70}\frac{ft}{min}

Simplify

s=\frac{3}{35}\frac{ft}{min}

5 0
3 years ago
Evaluate using the finite geometric sum formula
Sever21 [200]

Answer:

S_9=-18.703.

Step-by-step explanation:

The given series is,

\sum_{i=1}^9(-\frac{1}{2})^{i-1}

When we substitute i=1, we get the first term, which is a_1=-28(-\frac{1}{2})^{1-1}


This implies that,

a_1=-28(-\frac{1}{2})^{0}


a_1=-28(1)=-28.


The common ratio is

r=-\frac{1}{2}


The finite geometric sum is given by the formula,

S_n=\frac{a_1(r^n-1)}{r-1} , -1\:.


Since there are 9 terms, we find the sum of the first nine terms by putting n=9 in to the formula to get,


S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}.


S_9=\frac{-28((-\frac{1}{2})^9-1)}{-\frac{1}{2}-1}.


S_9=\frac{-28((-\frac{1}{512})-1)}{-\frac{3}{2}}.


S_9=\frac{-28(-\frac{513}{512})}{-\frac{3}{2}}.


S_9=-28(\frac{171}{256}).


S_9=-\frac{1197}{64}.



S_9=-18.703.


The correct answer is B





4 0
3 years ago
Read 2 more answers
5 points for a simple math problem!!
SpyIntel [72]

Answer:

48

Step-by-step explanation:

Wrong : right

1            :12

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1*4      : 4*12

4         :48

If she gets 4 problems wrong, she gets 48 problems right

7 0
4 years ago
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horrorfan [7]
I think the answer is the first option.
4 0
3 years ago
I need help! 50 points!
o-na [289]

The equation of this sinusoidal function is either

f(x) = a sin(bx) + c

or

f(x) = a cos(bx) + c

Either way, the plot of f9x) has amplitude a, period 2π/b, and midline y = c.

If the period is π/2, then

2π/b = π/2   ⇒   b = 4

If the maximum value is 10 and the minimum value is -4, then

-4 ≤ a sin(4x) + c ≤ 10

-4 - c ≤ a sin(4x) ≤ 10 - c

-(4 + c)/a ≤ sin(4x) ≤ (10 - c)/a

Recall that sin(x) is bounded between -1 and 1. So we must have

-(4 + c)/a = -1   ⇒   a = c + 4

(10 - c)/a = 1   ⇒   a = -c + 10

Combining these equations and eliminating either variable gives

a + a = (c + 4) + (-c + 10)   ⇒   2a = 14   ⇒   a = 7

a - a = (c + 4) - (-c + 10)   ⇒   0 = 2c - 6   ⇒   c = 3

Finally, we have either

f(x) = a sin(bx) + c   ⇒   f(0) = c = 3

or

f(x) = a cos(bx) + c   ⇒   f(0) = a + c = 3

but the cosine case is impossible since a = 7.  

So, the given function has equation

f(x) = 7 sin(4x) + 3

8 0
2 years ago
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