Suppose Galileo and his assistant were 1 km apart when Galileo uncovered his lantern to try to measure the speed of light. How long would it have taken the light signal to reach his assistant?

Answers

Answer 1
Answer: There are many theories and measurement for the speed of light. It is believed that light travels at 299,792 km per second.  In the earlier day philosopher Aristotle believed that light didn't travel but happens instantaneously.  Therefore, for Galileo and his assistant to be only 1km apart, I would have to agree with Aristotle theory of light traveling instantaneously.

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Express the exact value of csc 60 degrees with a rational denominator?

Answers

csc60^o=(1)/(sin60^o)=(1)/((\sqrt3)/(2))=(2)/(\sqrt3)=(2)/(\sqrt3)\cdot(\sqrt3)/(\sqrt3)=(2\sqrt3)/(3)

Note that the exact value of csc 60° with a rational denominator is (2√3)/3.

How to compute the above

The reciprocal identity states that csc(theta) = 1/sin(θ).

Since we know that sin 60 degrees = √3/2, we can substitute this value into the reciprocal identity   -

csc 60° = 1/(√3/2).

To rationalize the denominator, we multiply the numerator and denominator by the conjugate of the denominator   -

csc 60°= (1/(√3/2)) * (√3/√3).

csc 60° = √3/(√3 * (√3/2)).

= √3/(√3 * √3/2).

= √3/(√9/2).

= √3/(3/2).

To divide by a fraction, we multiply by its reciprocal   -

csc 60° = √3 * (2/3).

csc 60°  = (2√3)/3.

So it is correct to state that , the exact value of csc 60°  with a rational denominator is (2√3)/3.

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Simplify.27 ÷ (–9 – (–6 ))









A.
9







B.
3







C.

–3








D.

–9

Answers

So,

(27)/(-9 - (-6))

Simplify the innermost numbers first.
(27)/(-9 + 6)
(27)/(-3)

Simplify.
(-9)/(1) \ or\ -9
27/[-9-(-6)]=27/(-9+6)=27/(-3)=\boxed{\boxed{-9}}\leftarrow the\ answer

Factor : 49c^2 - 25d^6

Answers

49c^2 - 25d^6
(7c)^2 - (5d^3)^2
(7c + 5d^3)(7c - 5d^3)

The answer is: (7c + 5d^3)(7c - 5d^3).
Hello,

49c^(2)-25d^(6)=(7c)^2-(5d^3)²=[7c-5d^3][7c+5d^3]

A can of 3 tennis balls sells for $2. If Sal spent more than $24 on tennis balls, which inequality can be used to find n, the number of tennis balls Sal could have bought? Two-thirds n greater-than 24 Three-halves n greater-than 24 2 n greater-than 24 3 n greater-than 24.

Answers

Answer:

A

Step-by-step explanation:

i just did the test

Phil made 50 ounces of purple dye by mixing a solution consisting of 15% blue dye and 85% red dye. How many ounces of red dye did he use in the process?

Answers

In accordance with given data correct answer is

RD=  85% * 50 = 0.85 * 50 = 42.5 ounces of red dye.

Good luck!!!

Final answer:

Phil used 42.5 ounces of red dye in the process of making 50 ounces of purple dye, given that the mixture was 85% red dye.

Explanation:

The question is asking us to determine how many ounces of red dye was used in the mixing process to produce 50 ounces of purple dye. Phil used a solution of 15% blue dye and 85% red dye. Therefore, the amount of red dye used can be computed by taking 85% of the total amount of dye made, which is 50 ounces.

To do this, we multiply the total ounces of dye (50 ounces) by the percentage of red dye (85%) used in the mixture. Mathematically, this is represented by the equation: (85/100) * 50.

Therefore, Phil used 42.5 ounces of red dye in the mixing process to make the purple dye.

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Gunner rides his bike 10 miles in 2 1/2 hours. How many miles per hour did Andre ride

Answers

Answer:

Step-by-step explanation:

10 miles divided by 2.5 hours is 4 miles per hour.

10/2.5 = 4