Professor plum is standing 10 feet from a street lamp the light from the lamp is making his shadow 8 feet long. he estimates that the angle of elevation from the tip of his shadow to the top of the street lamp is 40 degrees. about how high is the street lamp?
i know it's 18tan40, but where did the tangent come from? how do you know it's tan?

the answer is a

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500