25 points ???? ASAP PLEASE HELP
2 answers:
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So he drove 5hrs, before lunch, now, he was going at speed, say "r", after he ate, he sped up by 10mph, so, his rate is whatever "r" is, plus 10, or " r + 10 ", after lunch
we know the whole trip took 10hrs, so, is 5hrs before lunch and 5hrs after lunch
we also know the whole trip was 500miles, so if he drove, say "d" miles before lunch, after lunch he drove the slack after lunch, or " 200 - d "
recall, your d = rt, distance = rate * time
and I'm sure you know what that is
we know the whole trip took 10hrs, so, is 5hrs before lunch and 5hrs after lunch
we also know the whole trip was 500miles, so if he drove, say "d" miles before lunch, after lunch he drove the slack after lunch, or " 200 - d "
recall, your d = rt, distance = rate * time
and I'm sure you know what that is
To solve this problem, plug 8250 in for b and 15 in for t and then solve for k:
<em>*Divide both sides by 1000*</em>
<em>*Take the natural log (ln) of both sides*</em>
2.1102=15k
<em>*Divide both sides by 15*</em>
0.1406=k
0.1406 rounds to 0.141 which is close to a. 0.143.
Hope this helps!!