When is the estimation of products a useful tool?

Is 0.8 a rational or irrational number

Multiply and simplify the product. 2i (4 - 5i) Select the product. - 2i 2i - 10 + 8i 10 + 8i

Multiply and simplify (9-9^7) (3+2^7)

7: Jim, Kelly, and Samantha sold fundraiser tickets for the band. Jim sold 10 more tickets than Samantha. Kelly sold 15 fewer tickets than Jim. They sold a total of 65 tickets. How many tickets did each band member sell

How do you evaluate 71 - b, if b is 27

The minimum monthly payment for Janice's credit card is 2% of her balance or $10, whichever is higher. If Janice's balance at the end of her last billing cycle was $820, what is her minimum monthly payment? A) $16.40 B) $10.00 C) $25.20 D) $5.20

Tessa buys a silver coat rack priced at $224. Shipping and handling are an additional 19 % of the price. How much shipping and handling will Tessa pay?

7, 9, 11, 13 ... Generalize the pattern by finding an explicit formula for the nth term.

What's the formula for the surface area of a cone?

In a study of a particular brand of laptop computer, one group of 9 batteries lasted an average of 17.8 hours before needing recharging, and a second group of 11 batteries lasted an average of 18.1 hours.