Find the distance cd rounded to the nearest tenth? c=(7-4) d=-(-8-5)

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca