I do not understand this problem. Can I please get some help?

Explanation:

CD and BC are radii of the same circle. We are shown BC = 9, so CD is also 9

Through the segment addition postulate, we know that,

AC = AD + DC

AC = 6 + 9

AC = 15

The angle ABC is 90 degrees as this is a tangent point at the circle.

Triangle ABC is a right triangle. The leg AB is unknown, which we'll call x. The other leg is BC = 9. The hypotenuse is AC = 15

Use the pythagorean theorem to solve for x

a^2+b^2 = c^2

x^2+9^2 = 15^2

x^2+81 = 225

x^2 = 225-81 ... subtracting 81 from both sides

x^2 = 144

x = sqrt(144)  ... applying square root to both sides

x = 12

AB = 12

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3