What is the equation for the locus of points 10 units from the origin? A.) 10 = X+Y
B.) 10 = X^2+Y^2
C.) 100 = X+Y
D.) 100 = X^2+Y^2

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?