A Find all the missing elements:
B
A = 50°
C = 35°
А
с
b = 13
b
B = [?]° a = [] c=[ ]
a = C

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122