A study which reviews the traffic video of an intersection during rush hour to determine how many people

SAT

1 answer:

telo118 [61]3 years ago

5 0

Answer:

The correct option is;

D) Observational study

Explanation:

In an observational study, the researcher observes, notes and record the an occurrence of events which are due to the existence of a condition, test, risk factor, such that the experimental units are apparently out of the control of the researcher, or there are no researcher intervention in the study, due to either physical constraint or laid down ethics.

In the question, the researcher observes to determine the the number of people that run a light through pre recorded traffic video providing a physical restraint which makes it an observational study.

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A company has the goal of doubling their revenue from 32million dollars to 64 million dollars over the next 2 years. If the comp

klio [65]

Answer: the company has to increase its revenue in 33.33%

Explanation:

Let's see the companie's goal is to reach 64 million which is the double of 32 million.

the company increases its revenue by 50% which means that the company has increased it revenue in 16 millions.

32 million * 50/100 = 16 million

Now the the first year revenue is 32 million plus 16 million = 48 million

64 million - 48 million = 16 million (amount in which the company has to increase its revenue to reach 64 million)

with a simple three rule

48 million ----- 100%

16 million -------X

X= 1600/48 X= 33.33%

4 0

3 years ago

Read 2 more answers

Soon Yi loves to bake, and she is making flaky pastry. Soon Yi starts with a layer of dough 222 millimeters (\text{mm})(mm)left

frozen [14]

Answer:

3 times

Explanation:

When the dough is folded, it increases by a constant factor. We can model the growth of the thickness using the exponential growth model

$T(n)=T_0(1+r)^n$

Where:

Initial thickness, $T_0$ = 2mm

Growth factor, r =8%=0.08

We want to find the smallest number of times Soon Yi will have to roll and fold the dough so that the resulting dough is at least 2.5mm.

i.e When $T(n)\geq 2.5$ mm$

$2(1+0.08)^n\geq 2.5\\2(1.08)^n\geq 2.5\\$Divide both sides by 2$\\\dfrac{2(1.08)^n}{2}\geq \dfrac{2.5}{2}\\\\1.08^n\geq 1.25\\\\$Change to logarithm form\\n \geq \log_{1.08}1.25\\\\n\geq \dfrac{\log 1.25}{\log 1.08} \\\\n\geq 2.9$