What is 3/4 times 1/2
and what is 1.5 times 0.75
and then i need to figure out how much bigger the answer is to 1.5 times 0.75 is to 3/4 times 1/2

Can someone tell me if this is perpendicular? !

He letter p on the number line below represents the number . (use the hyphen for negative numbers and write answer as a decimal, such as –7.2) number line from negative 7 to positive 7 in increments of 0.5 is shown. only the whole numbers are labeled. a point labeled p is placed at the eleventh tick mark to the left of 0.

∠a and ∠ b are complementary. if m∠ b = 80°, what is the measure of ∠ a? 10° 80° 90° 100°