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Novay_Z [31]
2 years ago
15

(a) If cos² (34°) - sin² (34°) = cos(A°),then A = degree’s

Mathematics
1 answer:
krok68 [10]2 years ago
3 0

~~~~~~~\cos^2 \left(34^{\circ}\right) - \sin^2 \left( 34^{\circ} \right)=\cos A\\\\\implies \cos \left( 2 \cdot 34^{\circ} \right) = \cos A~~~~~~~~~~~~~;[\cos 2x = \cos^2 x -\sin^2 x]\\\\\implies \cos \left(68^{\circ}\right) = \cos A\\\\\implies A = 68^{\circ}

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1. The Fold-N-Go box factory makes boxes that hold 1 candle. The boxes measure 1 3 1 3 9 inches.
svet-max [94.6K]

Answer:

1. 360 cubic inches

2.(a)360 Cubic Inches, the owner is wrong

(b)6 in X 1 in X 1 in.

Step-by-step explanation:

1. Dimension of the box

Length=9 inch

Width=1 inch

Height=1 inch

Volume=LWH

=9*1*1 =9 Cubic Inches

Volume of the stack( of 40 candles)

=40*9

=360 Cubic Inches

2. Dimensions of Ella' Box are:

Length=10 inch

Width=6 inch

Height=6 inch

Volume=LWH

=10*6*6

=360 Cubic Inches

(a)The owner is not correct. The Volume of Ella's box is equal to the volume of the stack.

(b)Since the Width of the box is 6 Inch, the owner could cut the boxes into dimensions of 6 inX1 inx1 in.

It means each level will contain

(6*10) candles.

There will be 6 layers which equals the exact volume of Ella's box.

5 0
4 years ago
A store pays $147 for a skateboard. If the store marks it up 75%, then marks it down 22%. What is the new cost​
jeyben [28]

Answer:

200.65

Step-by-step explanation:

147 plus 75% or 110.25 minus 22% or 56.59

4 0
4 years ago
Read 2 more answers
Which value is in the domain of f(x)? PLS help :)
kkurt [141]

Answer:

(c) 4

Step-by-step explanation:

Given

The piecewise function

Required

The value in f(x) domain

The domain of f(x) is:

-6 < x \le 0 and 0 < x \le 4

Combine both inequalities:

-6 < x \le 4

List the values of the inequality

-6 < x \le 4 = \{-5,-4,-3,-2,-1,0,1,2,3,4\}

From the list of given options

Only 4 is among the domain

Others are not

3 0
3 years ago
Elise is investing 10,000 in an account that earns 2.25% simple interest. How many years will it take to have a balance of 12,70
kogti [31]

Answer:

12 years

Step-by-step explanation:

The formula to solve the above question i.e to find the time is given as:

Equation:

t = (1/r)(A/P - 1)

Calculation:

First, converting R percent to r a decimal

r = R/100 = 2.25%/100 = 0.0225 per year,

then, solving our equation

t = (1/0.0225)((12700/10000) - 1) = 12

t = 12 years

Therefore, if she does not add or withdraw from the account, the time it

will take to have a balance of 12,700 in her account is 12 years

8 0
3 years ago
Multiply. {}=3\dfrac{1}{2} \times 3\dfrac12=3 2 1 ​ ×3 2 1 ​
Inessa [10]

I assume you mean the product of mixed numbers,

3 1/2 × 3 1/2

If we write this as

(3 + 1/2) × (3 + 1/2) = (3 + 1/2)²

we can use the identity

(a + b)² = a² + 2ab + b²

so that

3 1/2 × 3 1/2 = 3² + (2 × 3 × 1/2) + (1/2)²

3 1/2 × 3 1/2 = 9 + 3 + 1/4

3 1/2 × 3 1/2 = 12 1/4

Alternatively, we can first write 3 1/2 as a mixed number:

3 + 1/2 = 6/2 + 1/2 = (6 + 1)/2 = 7/2

Then

3 1/2 × 3 1/2 = 7/2 × 7/2 = (7 × 7) / (2 × 2) = 49/4

and

49/4 = (48 + 1)/4 = ((4 × 12) + 1)/4 = 12 + 1/4

4 0
3 years ago
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