Can someone help me please

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Which number line correctly shows 0.8 + 0.3?

20 ! jason orders a data set from least to greatest. complete the sentence by selecting the correct word from each drop-down menu. the middle value of the data set is a measure and is called the part a: center b: spread part b: mean a: mean absolute deviation b: median c: range