Distance to the earth's center kilometer

The Neva River in St. Petersburg, Russia, is 74 km long. How long is it on a map drawn to a scale of 1:2,000,000?

The ocean covers 71% of the earth's surface. if the total surface area of the earth is about 510 million square kilometers, how many square kilometers are covered by the ocean?

one fourth of the students at a school have blonde hair. of those, one-third have blue eyes. if there are 432 students at the school, how many have blonde hair and blue eyes.

Does anyone know how to calculate the final grade in a class?

Harriet rode her bike 2 1/4 miles to the mall then she rode 3/4 miles to the grocery store she came back the way she went how many miles did harriet ride in all explain

The circumstance of a circular region is shown. What type of number best describes the diameter of the circle? Explain your answer

Sora gave her this clue. Find Sora's age My age is 10 more than one tenth of one tenth of one tenth of 3,000

Connor found that 60% of 40 is the same as 25% of another number, n. What is the value of n?

Elisa's mom teaches at preschool. There is 1 teacher for every 12 students at the preschool. There are 276 students at the preschool. Elisa is setting up equivalent ratios to find the number of teachers at the preschool.

A recent online survey published that a hospital needs 9 nurses for every 45 patients. How many nurses a hospital would need in order to take care of 255 patients?