If a sample of water is boiling while the external pressure is 505 kpa, what is the vapor pressure of the water? . . a.505 kpa . b.101.3 kpa . c,0 kpa . d.1010 kpa .

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?