Hi could someone pls help me with this problem ! ( This is 10th grade math )

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25) a 53ft cable runs from the top of an antenna to the ground. The angle of elevation made by the ground to the top of the antena is 25°
How tall is the antena ??

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?