The exponential function g, whose graph is given below, can be written as g(x)=a*b^x Complete the equation for g(x)

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The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!