Cho tam giác ABC ,góc B = 45°. Đường cao AH chia BC thành hai phần BH =20cm và HC = 21cm. Tính cạnh AB ,AC góc C và góc A của tam giác ABC

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).