几道PREP数学请求帮助

audrey1007

at least 100 students at a certain high school study japanese. if 4% of the students at the school who study  french also study japanese, do more students at the school study french than japanese ?

1. 16 students at the school study both french and japanese

2. 10 percent of the students at the school who study japanese also study french            

malik's recipe for 4 servings of a certain dish requires 1.5 cups of pasta. according to this recipe, what is the number of cups of pasta that malik will use the next time he prepares this dish?

1. the xext time he prepare this dish, malik will make half as many servings as he did the last time he prepare the dish

2. malik use 6 cups of pasta the last time he prepare this dish   此题中文意思没看懂，能帮忙解释一下吗？