Implement float math functions for two arrays #485

Job	Run time
clippy/stable	20s
Pass MSRV values to other jobs	2s
cross_test/s390x-unknown-linux-gnu/stable	1m 55s
cargo-careful	2m 19s
docs/nightly	20s
format/nightly	15s
cross_test/i686-unknown-linux-gnu/stable	1m 39s
nostd/thumbv6m-none-eabi/stable	19s
miri	7m 10s
blas-msrv	27s
tests/beta	22s
tests/nightly	24s
tests/stable	24s
tests/1.64.0	23s
conclusion	3s
	16m 22s

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