A house is 21/100 meters high with no roof the roof is 3/10 meters high what is the hight with roof

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?