C = pi * D
since the diameter is 2 * r
Although Alma did use a survey to ask her friends whether listening to music improves their test grades, she did not provide a sample nor could she experiment without using this variable. Thus, using the same reasoning, choices A, B, and C are excluded.
D) She did not use a random sample, and she tried to show cause and effect with an observational study.
Answer:
x = 60
Step-by-step explanation:
The sum of the angles in a triangle is 180
40 + x+20 + x = 180
Combine like terms
2x+60 =180
Subtract 60 from each side
2x+60-60 =180-60
2x =120
Divide by 2
2x/2 =120/2
x = 60
Answer:
<h2>8 characters a second</h2>
Step-by-step explanation:
Since we know that the competition is a year away, and his speed improves by 1/2 character a month, make a chart to show where he'll be 1 month from now, then 2 and so on...
Month 0 (Baseline) - 2 cas (characters a second)
Month 1 - cas
Month 2 - 3 cas
Month 3 - cas
Month 4 - 4 cas
Month 5 - cas
Month 6 - 5 cas
Month 7 - cas
Month 8 - 6 cas
Month 9 - cas
Month 10 - 7 cas
Month 11 - cas
Month 12 8 cas
If the current rate continues, James will be able to type 8 characters a second by the time the competition comes.
I'm always happy to help :)
Answer:
=5
Step-by-step explanation:
Given that an experimenter is studying the effects of temperture, pressure, and type of catalyst on yield from a certain chemical reaction. Three different temperatures, four different pressures, and five different catalysts are under consideration.
a) Experimental runs possible if use of single temperature, pressure and catalyst is there = no of temperatures x no of pressures x no of catalysts
= b) Here pressure and temperature have no choice as lowest is selected.
no of methods = no of catalysts x 1 x1
= 5