8r and 4r are like terms since they both have an r
also 3s and -3s are also like terms because of the s
Answer:
a) 69.99
b) .20%
Your welcom ,.hb
Step-by-step explanation:
You can use the properties of logarithm to get to the solution.
The approximate value for given term is given by
![log_3(14) \approx 2.402](https://tex.z-dn.net/?f=log_3%2814%29%20%5Capprox%202.402)
<h3>What is logarithm and some of its useful properties?</h3>
When you raise a number with an exponent, there comes a result.
Lets say you get
![a^b = c](https://tex.z-dn.net/?f=a%5Eb%20%3D%20c)
Then, you can write 'b' in terms of 'a' and 'c' using logarithm as follows
![b = log_a(c)](https://tex.z-dn.net/?f=b%20%3D%20log_a%28c%29)
Some properties of logarithm are:
![log_a(b) = log_a(c) \implies b = c\\\\\log_a(b) + log_a(c) = log_a(b \times c)\\\\log_a(b) - log_a(c) = log_a(\frac{b}{c})](https://tex.z-dn.net/?f=log_a%28b%29%20%3D%20log_a%28c%29%20%5Cimplies%20b%20%3D%20c%5C%5C%5C%5C%5Clog_a%28b%29%20%2B%20log_a%28c%29%20%3D%20log_a%28b%20%5Ctimes%20c%29%5C%5C%5C%5Clog_a%28b%29%20-%20log_a%28c%29%20%3D%20log_a%28%5Cfrac%7Bb%7D%7Bc%7D%29)
<h3>Using the above properties</h3>
![log_3(2) + log_3(7) = log_3(2 \times 7) = log_3(14)\\\\0.631 + 1.771 = log_3(14)\\\\log_3(14) = 2.402](https://tex.z-dn.net/?f=log_3%282%29%20%2B%20log_3%287%29%20%3D%20log_3%282%20%5Ctimes%207%29%20%3D%20log_3%2814%29%5C%5C%5C%5C0.631%20%2B%201.771%20%20%3D%20log_3%2814%29%5C%5C%5C%5Clog_3%2814%29%20%3D%202.402)
Thus,
The approximate value for given term is given by
![log_3(14) \approx 2.402](https://tex.z-dn.net/?f=log_3%2814%29%20%5Capprox%202.402)
Learn more about logarithm here:
brainly.com/question/20835449
You can do 280/40 would give you the answer for one minute, then whatever you get, multiply be 280, that is your answer for number 14.so it would be for every one minute you ride 7 miles. so it would be 7 miles times 20 minutes because you are calculating for an hour and we already have 40 minutes, it would give you 140 miles for 20 minutes, then you add 140 +280 which would give you your answer which is 420m/hr. if you read it step by step you would be able to understand.<span />