Answer:
A and B
Step-by-step explanation:
Reflection and rotation
Answer:
(a) False
(b)True
Step-by-step explanation:
(a) A factor in any experiment is a variable (independent) that you can control as you study the results obtained while changing its conditions .This means that the levels of the variable are set by experimenter as you perform the experiment.A factor can have two or more levels.These levels when combined, they form treatments.A factor is controlled by setting it to different levels,two or more to enable the researcher introduce different values of the factor to observe the trend in the results.Hence, set a factor to levels is very important.
(b)Randomization is when participants in an experiment are chosen to prevent bias.When randomization is applied, the participating groups will be similar in that there will be no accidental bias due to unbalance criterion.Additionally, selection bias that could arise due to underrepresented group will be eliminated.
Answer: it will take them 2.22 hours working together.
Step-by-step explanation:
It takes Destiny y 4 hours to file all the daily paperwork. This means that unit rate of Destiny would be
1/4 per hour.
It takes Susan 5 hours to file the same paperwork. This means that unit rate of Susan would be
1/5 per hour.
If they work together, they would work at their own individual rates. This means that their individual rates are additive.
Let t represent the time it will take them if they worked together. Since their combined rate is additive Therefore,
1/4 + 1/5 = 1/t
9/20 = 1/t
t = 20/9 = 2.22 hours
There are a total of 297 students in the 7th grade. Rough estimates would say that about half of that number are boys and half are girls. Asking only 50 random girls would be biased because not only would it not be all of the girls (the number of girls would be around 148 or 149) but it would also be ignoring the roughly 148 to 149 boys there are on estimate. The sample would be biased because it would be ignoring the opinions of more than half the seventh grade.
Answer:
Hayden's hourly rate is $30
Extra hour rate is 1.5×30=$45
given that he earned $2175 by working 40 regular hours, the number of overtime hours he worked will be given as follows;
let the number of overtime be x
hence total amount earned will be:
(40×30)+(45×x)=2175
1200+45x=2175
45x=2175-1200
45x=975
solving for x we get
x=975/45
x=65/3=21 2/3 hours
Therefore the answer is c.562.50
Step-by-step explanation:
brainliest please
