Atextbook costs $58 and sells for $70. find the rate of markup based on the selling price.

Let's dissect this problem: "A textbook costs $58" Okay, original amount: $58.

"and sells for $70" Okay, new price: $70. "Find rate of markup" Alright!

So to set up the problem, you need to find $58 times some number is $70.

That looks like  this:

$58 * SN = $70

Now divide $70 by $58

SN = 1.21

Now make it a percentage:

121%

Now subtract 100% because it is markup

21%

The markup on the textbook is 21%.

Hope that helps!

step-by-step explanation:

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.