Here you go, hope I helped.
Answer:
5 pounds of coffee
Step-by-step explanation:
Let the number of pounds of coffee bought be 'x'.
Given:
Value on gift card = $90
Value of coffee per pound = $8.09
Money left after buying coffee = $49.55
Now, using unitary method,
1 pound cost = $8.09
∴ 'x' pounds cost = 
Now, Money left = Total money on gift card - Cost of coffee.

Therefore, Lashonda bought 5 pounds of coffee.
so hmmm is compound interest, now, we'll be assuming the compounding period is per year, or annually, so it happens once per year.

If he hikes another 2 km, he will be halfway there.
17+2= (1/2)x
19=(1/2)x
38=x
Final answer: The total length of the hike is 38 km
1/4=0.25 0.25+1 =1.25
68/100= 0.68
1.25+0.68+0.7= 2.63
3/8= 0.375
13.5/100=0.135
0.375+0.42+0.135=0.93
sorry i took long