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Dominik [7]
3 years ago
15

Can i get some help on these math problems please

Mathematics
1 answer:
irga5000 [103]3 years ago
6 0

Answer:

15. 5,600,000

17. 469

i can't really see 19

Step-by-step explanation:


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A box with no top that has a volume of 1000 cubic inches is to be constructed from a 22 x 30-inch sheet of cardboard by cutting
Ganezh [65]

Answer:

a: 2.234

Step-by-step explanation:

i checked after i took the test. its right, enjoy

5 0
3 years ago
For 0 ≤ θ < 2 π what are the solutions to sin^2(θ) =2sin^2(θ/2)
gregori [183]

Recall the half-angle identity for sine,

sin²(x/2) = (1 - cos(x))/2

Then the given equation is identical to

sin²(θ) = 1 - cos(θ)

Also recall the Pythagorean identity,

sin²(θ) + cos²(θ) = 1

Then we rewrite the equation as

1 - cos²(θ) = 1 - cos(θ)

Factoring the left side, we have

(1 - cos(θ)) (1 + cos(θ)) = 1 - cos(θ)

and so

(1 - cos(θ)) (1 + cos(θ)) - (1 - cos(θ)) = 0

and we factor this further as

(1 - cos(θ)) (1 + cos(θ) - 1) = 0

which gives

cos(θ) (1 - cos(θ)) = 0

Then either

cos(θ) = 0   or   1 - cos(θ) = 0

cos(θ) = 0   or   cos(θ) = 1

[θ = arccos(0) + 2nπ   or   θ = -arccos(0) + 2nπ]

…   or   [θ = arccos(1) + 2nπ   or   θ = -arccos(1) + 2nπ]

(where n is any integer)

[θ = π/2 + 2nπ   or   θ = -π/2 + 2nπ]   or   [θ = 0 + 2nπ]

In the interval 0 ≤ θ < 2π, we get three solutions:

• first solution set with n = 0   ⇒   θ = π/2

• second solution set with n = 1   ⇒   θ = 3π/2

• third solution set with n = 0   ⇒   θ = 0

So, the first choice is correct.

6 0
3 years ago
Find the sum of -2 + 3i and -1- 2i.
blondinia [14]

Answer:

-3+i

Step-by-step explanation:

Collect like terms

-2-1=-3

+3i-2i=i

-3+i

7 0
2 years ago
Correct 48, 947.2547 to the nearest hundred​
VLD [36.1K]

Answer:

48,900

Step-by-step explanation:

Round

7 0
3 years ago
Is 660 10times as much as 600
Sladkaya [172]
<span>Is 660 10times as much as 600 yes it is</span>
3 0
3 years ago
Read 2 more answers
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