There are 172 south american animals in the springdale zoo. That is 45 more than half the number of african animals in the zoo. Write an equation you could use to find n, the number of african animals in the zoo

Answer:

The correct answer option is D. 0.42.

Step-by-step explanation:

We are given the results of a survey in which people were asked if they prefer reading books or e-books.

We are to find the marginal frequency of the number of people who prefer to read books.

For that, we will divide the total number of people who prefer reading books by the total number of people surveyed.

Marginal frequency = 105/250 = 0.42

To walk 2 kilometers, it will take a total of 20 minutes.

If 1 kilometer is 1000 meter. 2 kilometers will be 2000 meters.

Divide 2000 meters by 100 to get how long it will take to walk 2 km.

2000/100=20

20min/2km

Answer: C

Step-by-step explanation:

In the quadrant IV, it is only a cos θ that is positive.

Given that tan θ = –8∕15

Where tan θ = opposite ÷ adjacent

Where opposite = 8 and adjacent = 15

We can find the hypothenus by using pythagorean theorem

Hypothenus = sqrt(15^2 + 8^2)

Hypothenus = sqrt(289)

Hypothenus = 17.

Sin θ = opposite ÷ hypothenus

Sin θ = 8/17

Since Sin θ is also negative in the fourth quadrant, therefore

Sin θ = - 8/17

Option C is correct.