Question 25 of 25
2 points
which of these examples is an error of addition by one?
o
a. 35,427 + 63,562 = 98,889
o
b. 43,724 + 54,263 = 97,987
o
c. 28,546 + 61,352 = 89,898
o d. 17,642+72,345 = 89,987

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.