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vlabodo [156]
3 years ago
15

Is this a valid experimental design? A. B. C. D.

Mathematics
2 answers:
Marrrta [24]3 years ago
6 0

Answer: d

Step-by-step explanation: None needed

vagabundo [1.1K]3 years ago
3 0

Answer:

i would say 3

Step-by-step explanation: why? because most likely they are testing 2 different types and if one gets a unfair advantage that can ruin everything

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The car you just bought keeps breaking down. The parts you need to buy cost $408.97. Your mechanic also charges $53 per hour for
DiKsa [7]
C. repair charge = 53 * hours of labor + 408.97
7 0
3 years ago
Read 2 more answers
A video game is now being sold at 22% off for a price of $31.20. What was the original price of the video game?
BabaBlast [244]
Answer:

$38.06

Explanation:

Multiply $31.20 by 0.22 (22%)
Which equals 6.864
Add that to $31.20 and you get 38.064
Then you round it and get $38.06
5 0
3 years ago
Most evenings after dinner Duarte spends 30 minutes playing chess with his dad.
olasank [31]
T= total played
e= # evenings played
m= # minutes played

Total equals number of evenings played multiplied by number of minutes plated per evening.

EQUATION:
t=e * m

EQUATION (if 30 minutes per evening):
t=30e

Example:
3 nights, 30 minutes played

t= 3 * 30
t=90 minutes total played

Hope this helps!  :)
7 0
3 years ago
Which statement Is best represented by the inequality d<0.35? A. The pen cost less than $0.35. B. The pencil costs greater th
ankoles [38]

Answer:

Option A, The pen cost less than $0.35.

Step-by-step explanation:

The given inequality is d ∠ 0.35

Now we have to define this inequality with the help of given options.

If d represents the cost of pen, then cost of pen should be less than 0.35.

Option A, The pen cost less than $0.35. is the answer.

5 0
3 years ago
The angle of elevation to the top of a 30 story skyscraper is measured to be 3 degrees from a point on the ground 2,000 feet fro
Leto [7]
You have an angle of elevation of 3 degrees and you're 2000 ft from base of 30 story building. 
<span>Draw a picture of this. Then tan(3) = ht of bldg/2000 </span>
<span>I get a height of 104.82 ft rounded to 2 dp. </span>


<span>5. Ok. use the Pythagorean Theorem here to find the hypotenuse of the right triangle </span>
<span>hypt = sqrt(50^2 + 9^2) </span>
<span>Now sine of the angle of elevation is 50/hypt. = 0.984 or 0.98 to 2 dp.</span>
4 0
3 years ago
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