Hannah wants to have concrete stairs for
her backdoor. How much concrete will be
needed to build the stairs?
30 cm
70 cm
15 cm
10 cm
20 cm
70 cm
45 cm
[ ? ]cm3
Enter

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?