One advantage of using a credit card is

Convenience: You don’t have to worry about how much cash you have on hand. Just remember that you can always use a debit card instead. With a debit card you won’t be in danger of accumulating debt that will be subject to high interest charges if you don’t pay it off each month, like you would with a credit card. Remember to keep track of your checking account balance to be sure you can cover what you’re buying.

answer; i believe a ( newsletter ) should be sent;

bd = 9 cm

step-by-step explanation:

in a 30°-60°-90° triangle, the ratio of side lengths is 1 : √3 : 2. that is, the longest side (hypotenuse) is twice the length of the shortest side.

all of the triangles in your geometry are 30°-60°-90° triangles. ac is the hypotenuse of δacd, and the short side of δabc.

the short side ad of δacd will be half the length of ac, so 3 cm. the hypotenuse ab of δabc will be twice the length of ac, so 12 cm. segment bd is the difference of the lengths ab and ad, so is

bd = ab -ad

bd = 12 cm - 3 cm = 9 cm

comment on side length ratios

you can figure the ratios of side lengths in a 30°-60°-90° triangle by considering the trig ratios of the angles. or you can figure the length of the altitude of an equilateral triangle of side length 2 using the pythagorean theorem.