7) A shopkeeper spent LE 36.9 on 5.1 kilograms of bananas. Estimate the price they paid per kilogram. 8) The total area of Egypt is 1001450 square kilometres. The estimated population in July 2010 was 77840000 . a) Round each number to 1 significant figure. b) Calculate an estimate of the population density of Egypt a) Use estimation to show why these answers are incorrect. a) \( 662+304199+2193=401404 \) b) \( 0.864+0.0041+0.000421=1.03 \)

\( \$ 1395 \) per month over a 6 year period. What is the average annual rate of chang in the rent that your family pays?

Of the given choices, which is the best fix for this study? Have two groups - instruct one group to consume 1300 milligrams of calcium per day and instruct the other to not consume any calcium. Randomly contact 500 women. Ask whether they suffer from PMS and ask them how much calcium they consume on average each day. Randomly assign women struggling with PMS to one of two groups -have one group take a pill containing 1300 milligrams of calcium daily and the other group take an identical looking placebo pill. Make sure subjects do not know whether they are taking the calcium or placebo pill.

Ive the linear equation. Explain why there is either one, infinite, or no solution. \( 4(2+2 x)+7=-5(x-5)-10 \)

Simplify. \[ (5 \sqrt{x}-9)(\sqrt{x}-5) \]

II. Decide si el límite existe observando la gráfica. \( f(x)=\frac{x^{3}-x}{x-1} \quad g(x)=\frac{-2 x^{2}+x}{x} \)