(Time allowance: 2 minutes) In solving the following problem, the question is only what is the value to use for r? Tony wants to deposit at the end of each quarter into his savings account over 9 years to reach his vacation goal of $30,000. He is getting a 21% APR on his account. For your answer, use percentage denomination, not decimals; do not enter the % symbol. Round to the nearest 0.1 For example, if your answer is 0.0253 (2.5%) then enter 2.5. If your answer is 0.06 (6%) then enter 6.0 The value of ris