Find the number of flavored bottles each day, then add. On Monday, $25\%$ of 80 is $0.25(80)=20$. On Tuesday, $40\%$ of 60 is $0.40(60)=24$. Altogether, $20+24=44$. So the correct answer is $44$.

The amount of the discount is $80-68=12$ dollars. To find the percent discount, divide the discount by the original price: $\frac{12}{80}=0.15=15\%$. Therefore, the statement that must be true is that the discount is exactly $15\%$.

The original length is 20 feet. Increasing it by 25% means multiplying by $1.25$: $20(1.25)=25$. The width stays 15 feet, so the new area is $25\times 15=375$ square feet. Therefore, the correct answer is $375$.

First find $60\%$ of $5$ kilometers: $0.60\times 5=3$ kilometers. Then convert $3$ kilometers to miles using $1$ kilometer $\approx 0.62$ mile: $3\times 0.62=1.86$. So the participant has walked about $1.86$ miles.

Let the original price be $p$. After a $20\%$ markdown, the price becomes $80\%$ of $p$, or $0.8p$. Then \12$moreissubtracted,sothefinalpriceisrepresentedbytheequation$0.8p - 12 = 52$.Add12tobothsidestoget$0.8p = 64$.Thendivideby$0.8$:$p = \frac{64}{0.8} = 80$.Sotheoriginalpricewas$\$80$.