Brent biked 800 m on Friday. On Saturday, he biked 5 km. On Sunday, he biked over 2 km,300 m. How many kilometers did Brent bike over the three days?

8.1 km

Step-by-step explanation:

First add up the already km numbers. 5+2=7. Then convert the m numbers and add them. 800m+300m=1100m. This converted to km is 1.1km. Then add all of it together. 1.1+7=8.1.

step-by-step explanation:

i'm pretty sure it would take 20 hours because it's half the men so you multiply the number of hours it takes by 2

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places