A 60
B. 90
© 6. What is the standard form of (4x108) + (1x10%) +(3x106) + (2x105) + (0x104) +-
(7x103) + (6x102)?
A. 413, 207, 600
C. 4,132,076
B. 413 207 6
D. 4 132 007
@ 7. How many times does the digit 7 appear from 30 to 90?​