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STALIN [3.7K]
3 years ago
5

Evaluate Integral: 2sin(2x) from 0, pi/2

Mathematics
1 answer:
Neko [114]3 years ago
8 0
Integral of 2sin(2x) is -cos(2x)
from 0 to pi/2 (sub pi/2 minus sub 0 for x) and then solve
= -cos(2*pi/2)-(-cos0)
= -cos pi + cos 0
= 1 + 1
= 2 
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2) Which expressions are equivalent to 1/3 - (-1/4). Select all that apply.
marshall27 [118]
What are all that apply?
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3 years ago
The equation 7.50(n+0.2)=189 can be used to model the number of books, n , maggie orders. How many books does maggie order?
Reptile [31]
N= number of books

7.50(n + 0.2)=189
multiply 7.50 by each term in parentheses

(7.50*n) + (7.50*0.2)= 189
7.50n + 1.5= 189
subtract both sides by 1.5
7.50n= 187.50
divide both sides by 7.50
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ANSWER: She ordered 25 books.

Hope this helps! :)
4 0
3 years ago
A year has four seasons. What is the probability that a day chosen at random will be in the spring?
mestny [16]

Answer:

1/4; 25%

Step-by-step explanation:

if a year has four seasons we can say that there are 4 possibilities

spring appears once

this means that the probability that a day chosen at random will be in spring would be 1 out of 4

or 25%

6 0
3 years ago
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mariarad [96]
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4 0
3 years ago
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A small bottle of lemonade is half the size of a large bottle. The small bottle costs 80p and the large bottle costs £1.50. Amir
Leni [432]

80p = 80 cents

£1.50 = $1.50.

(changing the signs, that's it)

So if a small bottle is half the size of a large bottle, and is 80 cents.

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Now 4 small bottles is the same as 2 large ones, so if he bought 2 large bottles: $1.50 * 2 = $3.00.

$3.20 - $3.00 = 0.20 cents.

Amir would've saved 0.20

P.S. What is "p" in European money

4 0
3 years ago
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