How many ways can one rearrange the letters in the word circumference to form a string of 13 letter strings or words sensible or not

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Find the actual dimensions of the box. the side length are in meters and integers. the surface area of the box is 104 m2 and volume of the box is 60 m3.