How do I solve 4[2.5 + 3 (20 + 7)] ?

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Having a hard time understanding this question (see attachment).

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next