How many yards of concrete will a 20 by 30 slab need?

What is 7.08 rounded to the nerest tenth? Can two numbers have 15 as their HCF and 220 as their LCM? How much is 2000 drachma worth? What is the ratio of the unknown amount (x) invested in company A to the known amount (24) invested in company B Write the answer as a fraction.? What is 30 percent off 280? What are all the prime numbers up to 400? what are the numbers between 50 and 150? If you could do a high jump at 2.5 meters about how many feet did you jump? What are the equivalent fractions for 16 32? How is 2986.34157 rounded to three decimal places? What is the gcf of 90 135 and 72? What is the prime factorization of the numbers 68 69 70 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 and 100? A cube measure 4 inches on all of its sides what is the volume of the cube in inches? How do you convert the repeating decimal 0.998 into a fraction? A natural number but not a whole number? How do you write 4 billon in standard form? What are impeding factors? How do you write 13. 250 as decimal? How do you write 240.149 in word form? What are the first two common multiples of 2 3 and 7?