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Mumz [18]
4 years ago
11

I- i just need help at this point...

Mathematics
1 answer:
chubhunter [2.5K]4 years ago
5 0

Answer:

(2.8-3.5)/3.5=-.2 (100)=20%

Percent error is 20%

formula to fin percent error is ((approx-exact)/exact)(100)

Step-by-step explanation:

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A placebo is a substance that should elicit no positive response in an experimental subject.
adelina 88 [10]

Answer:

  A)  True

Step-by-step explanation:

In an experiment that has the purpose of testing the efficacy of a procedure or drug, comparison is made against the efficacy of a placebo, a procedure or drug that is <em>intended to have no effect whatever</em>.

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Famously, a placebo is often found to be nearly as effective (or even more effective) than the procedure or drug on trial. This effect is known as "the placebo effect."

7 0
3 years ago
Angle x and y are complementary. Angle x is supplementary to a 128º angle.
tiny-mole [99]

Answer:

x = 52

y = 38

Step-by-step explanation:

Angle x is supplementary to a 128º angle.

Supplementary angles add to 180

x+128 = 180

Subtract 128 from each side

x+128-128 = 180-128

x =52

Angle x and y are complementary.  

Complementary angles add to 90

x+y =90

52+y =90

Subtract 52 from each side

52-52 +y = 90-52

y = 38

4 0
3 years ago
Read 2 more answers
More than 5 Points! Find the area of a triangle, please. :)
Naddik [55]

The area is 27

I hope I'd have helped!

6 0
3 years ago
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PLEASE HELP ASAP 5 STARS, 20 POINTS
777dan777 [17]

Answer:

Step-by-step explanation:

Using the inequality rule, the third side has to be less than 12 + 16 = 28.
So, any answer of 28 or more than 28 does NOT satisfy the length.
It also has to be more than 4 to satisfy the inequality rule.

In short words, 4 < x < 28.

A, B and C all satisfy, because they are in the range of x

D) 32 is >28, so this is the wrong answer and CANNOT be the value of x.

7 0
3 years ago
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A deposit of $6000 is made in an account that earns 6% interest compounded quarterly. The balance in the account after n quarter
fomenos
Amount here is 6000
interest 6% =6/100= (r/100)*1/4
time is 5 yrs
solve this
3 0
3 years ago
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