12) An average 12 -ounce can of beer contains about 15 grams of alcohol. Consider a person with approximately 6 liters ( 6000 milliliters) of blood, who quickly drinks two cans of beer. If all the alcohol were immediately absorbed into the bloodstream, what blood alcohol content would we find?

A) \( f(x)=0.3 x^{5}+2 x^{3}+3 x^{2}-3 x \)

An observer standing 300 m from a vertical cliff uses a surveying instrument to determine that the angle of elevation of the top of the cliff is \( 52^{\circ} \). Calculate the height of the cliff, to the nearest metre. Draw the suitable diagram to help answer the question.

c) \( \frac{7}{3} \times \frac{5}{4}=\ldots \)

olve \( x^{2}+6=0 \) using complex numbers

point) alling object travels a distance given by the formula \( d=5 t+5 t^{2} \). where \( d \) is measured in fi neasured in seconds. How many seconds will it take for the object to travel 63 feet? Round th wer to 4 decimal places. seconds (numbers)