Is 0.63 a rational number

How do you write 6.37 in scientific notation?

The diameter of a circle is 16 kilometers. what is the circle's circumference? use 3.14 for ?.

Mrs. Ham is planning a party for students who have met their goal of reading seven books during the most recent eight weeks of virtual school. To celebrate this, she decided to have a party on the first day back to school.

A photograph is 3cm longer than it is wide. If a 4cm border is added to all sides, the the total area will be 460 sq cm. What are the dimensions of the photograph itself?

Christopher is 20 years younger than ishaan. ishaan and christopher first met two years ago. fourteen years ago, ishaan was 3 times as old as christopher. how old is christopher now?

A red ball has a mass that is less then 1 killogram. A blue ball has 1 killogram. is the mass of blue ball more then or less then the mass of the red ball?

Which situation represents a multiplicative relationship? A) Kevin is 8 years older than his brother Sean. B) For every cat at the pet store, there are 2 dogs. C) A buy one get one free sale on sweaters at the clothing store.

Solve the inequality to find the number of shirts, s, that Mary can buy.

what is the answer to this question right here (x - 4) (x - 3)

The measure of one angle is eleven more than four times a number. Another angle is twice the first angle's measure. The sum of the measures of the angles is 195° What is the measure of each angle in degrees?