Questions in mathematics

Questions in mathematics

[Done] How many prime numbers are there between 45 and 72?

[Done] What is \(1\) whole minus \(\frac{2}{3}\)?

[Done] Solve for \( k \) in the equation: \[ k + \frac{3}{4} = \frac{5}{3} - \frac{1}{3} \]

[Done] There are 8 red, 5 yellow, and 7 green cubes in a box. What is the probability of drawing a yellow cube and then a green cube if the first cube is not replaced before the second cube is drawn?

[Done] The total cost of renting a car is $30.00 for each day the car is rented plus $0.285 for each mile the car is driven. What is the total cost of renting the car for 5 days and driving 350 miles? (Note: No sales tax is involved.)

[Done] A man travels for 6 hours at a rate of 50 miles per hour. His return trip takes him 7.5 hours. What is his average speed for the whole trip?

[Done] Write an algebraic expression for 15 decreased by twice a number.

[Done] Write an algebraic expression for the product of 33 and \( j \).

[Done] Television screen sizes are the diagonal length of the rectangular screen. Hector recently changed from watching a television with a 13-inch screen to a television with a similar 19-inch screen. If a boxcar appeared 8 inches long on the 13-inch screen, how long, to the nearest inch, will it appear on the 19-inch screen?

[Done] How do you find the circumference and area of a circle? Please provide examples or a link to a website.