Beast Control: Start by Not Messing with That Turtle

[Assume that the beast "Fire Fox" can cause a point of damage each time it attacks. If it attacks n times in a row, the total damage will be:] A. A×n B. A+n C. A^n D. N^a What the hell is the topic? Tang Yuan frowned slightly, resisted the urge to complain, and continued reading. [The speed v of the royal beast "Wind Eagle" is inversely proportional to its weight w. If the Wind Eagle weighs 2kg, its speed is 15m/s. Then when the Wind Eagle weighs 3kg, its speed is _______m/s. [Every time the beast "Thunder Tiger" releases a thunder and lightning skill, it has a probability of hitting the target. If the Thunder Tiger releases the skill 10 times in a row, find the probability of hitting the target at least 7 times. Chen Xuan looked at Tang Yuan with clear yet stupid eyes, feeling that there was a kind of beauty in him that was not contaminated by knowledge. "Well, I'll give you a chance. If you can solve this problem, I won't ask your parents!" I saw Chen Xuan turning over the test paper and pointing to an application question. [The speed v of the royal beast "Snow Wolf" moving in the snow is related to the thickness of the snow d, and the relationship is v=k/d (where k is a constant). If the snow wolf needs to cross a snowfield with thickness D in t minutes, find the fastest speed of the snow wolf.