17. Donald tried to solve the equation 4x – 11 = -2(6 – 52) - 7, but he made a mistake. His work is shown below.
Step Equation
42 – 11 = -2(6 – 51) +7
1
43 – 11 = -12 - 101 7
2
41 – 11 = 100 – 5
3
141 – 11 = -5
4
141 = 7
1
2
In which step did Donald first make a mistake?
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30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

27

step-by-step explanation:

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).