New SAT Math - Calculator : New SAT Math - Calculator

Study concepts, example questions & explanations for New SAT Math - Calculator

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Example Questions

Example Question #291 : New Sat

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Approximate the Average Yearly change in the number of PhD's.

Possible Answers:

Correct answer:

Explanation:

What this question is asking for is to approximate the slope of the line of best fit. To calculate the slope, we need to find find two points on the line. The best points to pick out is , and . Now we can find the rate of change by using the following equation.

, where  are points on the line.

 

Example Question #51 : New Sat Math Calculator

The table below shows the number of college graduates per 2 months

 

 

Which 2 month period had the most college graduates?

 

Possible Answers:

Correct answer:

Explanation:

In order to answer this question, we need to add each column up and see what column is the largest.

It looks like that the  2 month period has the most college graduates.

Example Question #24 : Graphing

The equation  represents a line.  This line does NOT pass through which of the four quadrants?

Possible Answers:

Cannot be determined

IV

II

I

III

Correct answer:

III

Explanation:

Plug in  for  to find a point on the line:

Thus,  is a point on the line.

Plug in   for  to find a second point on the line:

 is another point on the line.

Now we know that the line passes through the points  and .  

A quick sketch of the two points reveals that the line passes through all but the third quadrant.

Example Question #182 : Geometry

A vase needs to be filled with water.  If the vase is a cylinder that is \dpi{100} \small 12{}'' tall with a \dpi{100} \small 2{}'' radius, how much water is needed to fill the vase?

Possible Answers:

\dpi{100} \small 48\pi

\dpi{100} \small 24\pi

\dpi{100} \small 12\pi

\dpi{100} \small 64\pi

\dpi{100} \small 96\pi

Correct answer:

\dpi{100} \small 48\pi

Explanation:

Cylinder

\dpi{100} \small V = \pi r^{2}h

\dpi{100} \small V = \pi (2)^{2}\times 12

\dpi{100} \small V = 4\times 12\pi

\dpi{100} \small V = 48\pi

Example Question #221 : Algebra

Solve for x

\small 3x+7 \geq -2x+4

 

Possible Answers:

\small x \leq \frac{3}{5}

\small x \leq -\frac{3}{5}

\small x \geq \frac{3}{5}

\small x \geq -\frac{3}{5}

Correct answer:

\small x \geq -\frac{3}{5}

Explanation:

\small 3x+7 \geq -2x+4

\small 3x \geq -2x-3

\small 5x \geq -3

\small x\geq -\frac{3}{5}

Example Question #51 : New Sat Math Calculator

What is the focus of the above quadratic equation?

Possible Answers:

Correct answer:

Explanation:

The focus is solved by using the following formula , where  are the coordinates of the vertex, and  is the distance from the vertex. To solve for , we use

, where  is the coefficient in front of the  term and  is the focus.

 

Since , we can substitute in to get,

Now we need to find the vertex of the equation.

Since our equation is in vertex form, we can deduce that the vertex is at 

So the focus is at 

Example Question #91 : Data Analysis

 

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The bar chart shows the number of consecutive heads for a fair coin. How many more 4 Heads were there compared to 3 Heads?

Possible Answers:

Correct answer:

Explanation:

To figure this out, we need to go to the y-axis and find the number of 4 heads and 3 Heads there were. . Now we find the difference between them, which is simply .

Example Question #61 : How To Find Arithmetic Mean

Screen shot 2016 02 12 at 9.39.26 am

Find the average rate of change between 3 Heads and 5 Heads

 

Possible Answers:

Correct answer:

Explanation:

The average rate of change is calculated by the following.

So we simply do the following,

Example Question #52 : New Sat Math Calculator

 

 Week 1 Homework Time                       Week 2 Homework Time

                          

 

The above tables show how much time Amanda spent doing homework during the first 2 weeks of school. Which week has the largest standard deviation?

Possible Answers:

Correct answer:

Explanation:

The first step is to calculate the mean for each table.

 

Recall how to find the standard deviation

 

Now we will apply this to each table.

 

 

Since  is our answer

 

Example Question #111 : Circles

Tangents

In the above diagram,  has length . Give the radius of the circle to the nearest whole number.  

Possible Answers:

The question cannot be answered with the information given.

Correct answer:

Explanation:

Call . The measure of the corresponding major arc is  

If two tangents are drawn to a circle from a point outside the circle, the measure of the angle they form is equal to half the difference of the measures of their intercepted arcs; therefore

Substituting:

Therefore, . Since  has length , it follows that if  is the circumference of the circle, 

Divide the circumference by  to obtain the radius:

.

This makes 47 the correct choice.

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