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k0ka [10]
3 years ago
12

A student gently drops a ball from different heights and measures the time it takes to fall to the ground. Which statement BEST

describes why the investigation is an experimental study? A) The student does not use a control group. B) There is only one independent variable involved. C) The student sets the values of the independent variable. D) It is possible to establish a cause-effect relation between the variables.
Mathematics
1 answer:
Ksju [112]3 years ago
7 0

Answer:

c

Step-by-step explanation:

i think not 100 percent sure

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Find the sum of the solutions of this equation 3x2+14x+8=0
Dimas [21]

Answer:

3x^2+14x+8=0

(3x^2+12x) (2x+8)=0

3x(X+4) 2(X+4)=0

so, (3x+2) (X+4)=0

either 3x+2=0

X= -2/3

or X+4=0

X= -4

now sum of solutions so

-2/3+-4

(-2+-12)/3

-14/3

5 0
3 years ago
Read 2 more answers
Calculate the amount of interest you'll have at the end of the indicated period.
Alexeev081 [22]

Answer:

$160

Step-by-step explanation:

I = 800 * 5 * 4% (I multiply the time and principal first, so I already have the wholes covered.)

I = 4,000 * 4% (now to convert 4% and 4000 into fractions.)

I = 4000/1 * 1/25 (Cross cancel if needed. GCF is 25.)

I = 160/1 * 1/1 (Just remove 1/1)

I = $160 (There's your answer!)

3 0
4 years ago
For the following right triangle, find the side length x. Round your answer to the nearest hundredth.
jarptica [38.1K]

Answer:

xx=\sqrt{19^2-10^2}=\sqrt{361-100}  =\sqrt{261} \approx16.15549\\\approx16.16

Step-by-step explanation:

x=\sqrt{19^2-10^2}=\sqrt{361-100}  =\sqrt{261} \approx16.15549\\\approx16.16

4 0
3 years ago
37/50 of a number is what percentage of that number
Ronch [10]

Answer:

74%

Step-by-step explanation:

Multiply both the numerator and denominator by 2 so that you will have a number over 100. After doing this you will have 74/100 which is 74%

6 0
3 years ago
Read 2 more answers
In a geometric sequence, a2 = 2, a3 = 20, & a4 = 200.
babymother [125]

Answer:

the first one

the first one Step-by-step explanation:

the first one Step-by-step explanation:from the formula Un =ar^n-1

where a is 2

where a is 2 r = 20/2=10

where a is 2 r = 20/2=10 so Un= 10×2^n-1

that's all.....have fun

5 0
3 years ago
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