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Nesterboy [21]
2 years ago
10

You and your friends decide to rent some studio time to make a CD. Big notes studio rinse for $100 plus $60 per hour. Great soun

d studio rinse for $25 plus $80 per hour. Determine the number of hours of which the cost of renting the studio is the same
Mathematics
1 answer:
Orlov [11]2 years ago
8 0
About 3.8 hours, if asking for a whole number round to 4
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There are 8 ounces in 1 cup. The table shows some conversions between ounces and cups. Which equation describes how to convert b
ipn [44]

Answer:

Z=8C

If you times Cups C by 8, you get ounces Z. Sorry, not too sure how to explain here.

7 0
2 years ago
For what values of θ on the polar curve r=θ, with 0≤θ≤2π , are the tangent lines horizontal? Vertical?
Bond [772]
Given that r=\theta, then r'=1

The slope of a tangent line in the polar coordinate is given by:

m= \frac{r'\sin\theta+r\cos\theta}{r'\cos\theta-r\sin\theta}

Thus, we have:

m= \frac{\sin\theta+\theta\cos\theta}{\cos\theta-\theta\sin\theta}



Part A:

For horizontal tangent lines, m = 0.

Thus, we have:

\sin\theta+\theta\cos\theta=0 \\  \\ \theta\cos\theta=-\sin\theta \\  \\ \theta=- \frac{\sin\theta}{\cos\theta} =-\tan\theta

Therefore, the <span>values of θ on the polar curve r = θ, with 0 ≤ θ ≤ 2π, such that the tangent lines are horizontal are:

</span><span>θ = 0

</span>θ = <span>2.02875783811043
</span>
θ = <span>4.91318043943488



Part B:

For vertical tangent lines, \frac{1}{m} =0

Thus, we have:

\cos\theta-\theta\sin\theta=0 \\  \\ \Rightarrow\theta\sin\theta=\cos\theta \\  \\ \Rightarrow\theta= \frac{\cos\theta}{\sin\theta} =\sec\theta

</span>Therefore, the <span>values of θ on the polar curve r = θ, with 0 ≤ θ ≤ 2π, such that the tangent lines are vertical are:

</span>θ = <span>4.91718592528713</span>
3 0
3 years ago
In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by eval
Maslowich
In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by evaluating the expression 

d= \sqrt{12h}

We are given the height h of a person from surface of sea level to be 350 m and we are to find the the distance to horizon d. Using the value in above expression we get:

d= \sqrt{12*350}=64.81

Therefore, the approximate distance to the horizon for the person will be 64.81 km
8 0
3 years ago
Simplify 400000000000 into exponents​
DiKsa [7]

Answer:

The exponent will be 4*10^11

Step-by-step explanation:

^11 This means 11 is an exponent on top.

Hope it helps. Let me know.

3 0
2 years ago
Are those two expression equivalent when x=10 <br> 5(3x+8)<br> 8(x+8
My name is Ann [436]
No, the first choice equals 190 and the second 144.
6 0
3 years ago
Read 2 more answers
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