(4 tens 3 ones) x10 write in unit form and standard form

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!