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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

Mathematical Practices

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Exercise 3 Page 164

How can the rate at which we drive be expressed?

≈ 8.77 hours

Practice makes perfect

The rate at which we drive is commonly expressed as distance divided by time. Rate=Distance/TimeWe are told that we drive 236 miles in 4.6 hours. Let's use this to find the rate. Rate=236/4.6 Thus, the rate is 2364.6. Next we want to know how long time it will take to to travel 450 miles at this rate. Let's once more use the rate formula.

Rate=Distance/Time

Rate= 236/4.6, Distance= 450

236/4.6=450/Time

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Solve for Time

LHS * 4.6=RHS* 4.6

236=2070/Time

Multiply by Time

236(Time)=2070

.LHS /236.=.RHS /236.

Time=8.771186...

Round to 2 decimal place(s)

Time≈ 8.77

It will take approximately 8.77 hours to drive 450 miles.

Subchapter links

Monitoring Progress p.164