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55/85 Marks
The "off-peak" weekly average cost of hiring a caravan in Wales is £520.
In July the average cost increases to £800.
Calculate the percentage increase in cost.
Give your answer to 2 significant figures.

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

Using elimination, what is -4x+2y=-12 4x+8y=-24

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?