The Richardson family collects seashells. They have a total of 75 seashells in their collection. They classified the seashells and found that they have 13 cockle shells, some conch shells, and a variety of other kinds of shells that make up 60% of their collection. How many shells in their collection are neither conch shells nor cockle shells?

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

6.25 grams

step-by-step explanation: