The number 58,000,000 is number that may be expressed in its scientific notation as 5.8 x 10^9. However, we are asked to answer such that the product be of single digit only. That is obtained by rounding the number 5.8 to 6. Thus, the answer is 6 x 10^9.
Answer: 55 cookies in 80 mins Step-by-step explanation: 1 hour has 60 mins so 25/60=0.417 0.417/3=0.139 0.139x4=0.556 so he can eat 55 cookies in 80 mins