Center city has a population of twenty -one thousand, seventy people . write the population in standard form

Agroup of three friends order a combo meal which includes two slices of pizza and a drink each drink is priced at $2.50 the combined total of $31.50 how much is the cost of a slice of pizza

The base of a pyramid is a square with 5 lines of 5cm the slant height of each lateral face of the pyramid is 6 cm what is the surface area of the pyramid

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =