A grocer stacks oranges in a four-sided pyramid that is 7 layers high. How many oranges are in the pile? The explicit formula for a pyramidal sequence is P(n)=n(n+1)(2n+1)/6

Mickey needs to cut pieces of ribbon that are each 1 meter long tie onto balloons. if he has 8 pieces of ribbon that are each 1 dekameter long. how many 1 meter pieces of ribbon can he cut

In what organelle does photosynthesis take place?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.