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lys-0071 [83]
3 years ago
14

A mad scientist develops a new memory pill and wishes to test it on a group of 11th grade students. He has a large number of sug

ar pills manufactured that look and taste exactly like the memory pills. He asks the manufacturer to prepare 50 envelopes, each containing a month's worth of doses of the memory pills, and 50 more envelopes with the same doses of sugar pills.
The manufacturer then randomly labels the 100 envelopes with numbers from 00 to 99 and delivers them to the scientist. It has recorded which numbers go with the real pills, but it doesn't tell him. Which of the following adjectives describes this experiment?
A. Double-blind
B. Explanatory
C. Hawthorne
D. Blocked
E. Multi-factor
Mathematics
1 answer:
melomori [17]3 years ago
8 0
Its A. Double-blind since they dont know which pill is in which envelope

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mary says then pen for her horse is a acute right angle. is this possible? explain clearly and explain everthing
Goryan [66]
The acute right angle means, the right angle is an acute angle so therefor it is not possible, because it is an acute angle not a right angle. Hope this helps :)
3 0
3 years ago
How to factor <br> 49y^{2}-9x^{2}
lorasvet [3.4K]

Answer:

(7y + 3x)(7y - 3x)

Step-by-step explanation:

a² - b² = (a + b)(a - b)

49y² - 9x² = (7y)² - (3x)²                   {a = 7y ; b - 3x}

               = (7y + 3x)(7y - 3x)

7 0
3 years ago
Determine whether the ratios are equivalent. 3:8 and 9: 24. are they equivalent or not?​
Simora [160]

Answer:

Yes, they are equivalent.

Step-by-step explanation:

9 / 3 = 3

24 / 3 = 8

3:8 is just the simplified version of 9:24. This is due to 9:24 being divided by three, becoming 3:8.

8 0
3 years ago
A color printer can print 36 pages in three minutes in 108 pages in nine minutes if the number of pages varies directly with the
nignag [31]

Answer:

12 pages per minutes

Step-by-step explanation:

36 pages in 3 minutes, so each minutes can print 12 pages

And 108 pages in 9 minutes, which is still 12 pages

So 12 pages per minute

7 0
3 years ago
Heather is cashier, she can ring up 12 customers in 9 minutes at this rate how many minutes does it take to ring up 4 customers
stellarik [79]

Answer:

5.2 minutes for 4 costomers.

Step-by-step explanation:

12/9=1.333 (3 repeating)

1.3 x 4 = 5.2

5 0
3 years ago
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